20013731311613 has 16 divisors (see below), whose sum is σ = 21923652554496. Its totient is φ = 18158984558400.

The previous prime is 20013731311603. The next prime is 20013731311663. The reversal of 20013731311613 is 31611313731002.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20013731311613 - 2¹⁰ = 20013731310589 is a prime.

It is a super-2 number, since 2×20013731311613² (a number of 27 digits) contains 22 as substring.

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 20013731311613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20013731311603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46864613 + ... + 47289738.

It is an arithmetic number, because the mean of its divisors is an integer number (1370228284656).

Almost surely, 2^{20013731311613} is an apocalyptic number.

It is an amenable number.

20013731311613 is a deficient number, since it is larger than the sum of its proper divisors (1909921242883).

20013731311613 is a wasteful number, since it uses less digits than its factorization.

20013731311613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94154644.

The product of its (nonzero) digits is 6804, while the sum is 32.

The spelling of 20013731311613 in words is "twenty trillion, thirteen billion, seven hundred thirty-one million, three hundred eleven thousand, six hundred thirteen".