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20321020103223 = 3717227250756057
BaseRepresentation
bin1001001111011010110110…
…01011110100101000110111
32122221200002211102102012110
410213231123023310220313
510130414422121300343
6111115203041022103
74165100551621110
oct447553313645067
978850084372173
1020321020103223
116525107097a74
122342424624933
13b45357c45838
14503784d47207
152538e2b13833
hex127b5b2f4a37

20321020103223 has 32 divisors (see below), whose sum is σ = 32931291585024. Its totient is φ = 10880806781952.

The previous prime is 20321020103221. The next prime is 20321020103231. The reversal of 20321020103223 is 32230102012302.

It is a happy number.

It is not a de Polignac number, because 20321020103223 - 21 = 20321020103221 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 20321020103223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20321020103221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 125296990 + ... + 125459067.

It is an arithmetic number, because the mean of its divisors is an integer number (1029102862032).

Almost surely, 220321020103223 is an apocalyptic number.

20321020103223 is a deficient number, since it is larger than the sum of its proper divisors (12610271481801).

20321020103223 is a wasteful number, since it uses less digits than its factorization.

20321020103223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250756311.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 20321020103223 its reverse (32230102012302), we get a palindrome (52551122115525).

The spelling of 20321020103223 in words is "twenty trillion, three hundred twenty-one billion, twenty million, one hundred three thousand, two hundred twenty-three".

Divisors: 1 3 7 17 21 51 119 227 357 681 1589 3859 4767 11577 27013 81039 250756057 752268171 1755292399 4262852969 5265877197 12788558907 29839970783 56921624939 89519912349 170764874817 398451374573 967667623963 1195354123719 2903002871889 6773673367741 20321020103223