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20103102310231 = 66133719022001
BaseRepresentation
bin1001001001000100111100…
…10001011010011101010111
32122011211121202122112111101
410210202132101122131113
510113332123142411411
6110431123202250531
74143254421136423
oct444423621323527
978154552575441
1020103102310231
116450750192796
122308148356a47
13b2a939749bb5
144d6dd1317b83
1524cddb6238c1
hex12489e45a757

20103102310231 has 8 divisors (see below), whose sum is σ = 20139490272528. Its totient is φ = 20066732400000.

The previous prime is 20103102310163. The next prime is 20103102310237. The reversal of 20103102310231 is 13201320130102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20103102310231 - 27 = 20103102310103 is a prime.

It is a super-2 number, since 2×201031023102312 (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20103102310199 and 20103102310208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20103102310237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2282770 + ... + 6739231.

It is an arithmetic number, because the mean of its divisors is an integer number (2517436284066).

Almost surely, 220103102310231 is an apocalyptic number.

20103102310231 is a deficient number, since it is larger than the sum of its proper divisors (36387962297).

20103102310231 is an equidigital number, since it uses as much as digits as its factorization.

20103102310231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9026033.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 20103102310231 its reverse (13201320130102), we get a palindrome (33304422440333).

The spelling of 20103102310231 in words is "twenty trillion, one hundred three billion, one hundred two million, three hundred ten thousand, two hundred thirty-one".

Divisors: 1 661 3371 2228231 9022001 5963542661 30413165371 20103102310231