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20312203301 = 13109139281367
BaseRepresentation
bin10010111010101100…
…111010000000100101
31221102120222211122222
4102322230322000211
5313044411001201
613155321002125
71316232610415
oct227254720045
957376884588
1020312203301
118683788a85
123b2a623345
131bb9289110
14da9954645
157dd38a91b
hex4bab3a025

20312203301 has 32 divisors (see below), whose sum is σ = 22374105600. Its totient is φ = 18328343040.

The previous prime is 20312203291. The next prime is 20312203393. The reversal of 20312203301 is 10330221302.

It is a cyclic number.

It is not a de Polignac number, because 20312203301 - 26 = 20312203237 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20312203301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20312203001) 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, 55346420 + ... + 55346786.

It is an arithmetic number, because the mean of its divisors is an integer number (699190800).

Almost surely, 220312203301 is an apocalyptic number.

It is an amenable number.

20312203301 is a deficient number, since it is larger than the sum of its proper divisors (2061902299).

20312203301 is a wasteful number, since it uses less digits than its factorization.

20312203301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 20312203301 its reverse (10330221302), we get a palindrome (30642424603).

The spelling of 20312203301 in words is "twenty billion, three hundred twelve million, two hundred three thousand, three hundred one".

Divisors: 1 13 109 139 281 367 1417 1807 3653 4771 15151 30629 39059 40003 51013 103127 196963 398177 507767 520039 663169 1340651 4257431 5560417 11240843 14334653 55346603 72285421 146130959 186350489 1562477177 20312203301