20320013031 has 16 divisors (see below), whose sum is σ = 27346080000. Its totient is φ = 13420709568.

The previous prime is 20320013029. The next prime is 20320013033. The reversal of 20320013031 is 13031002302.

It is an interprime number because it is at equal distance from previous prime (20320013029) and next prime (20320013033).

It is not a de Polignac number, because 20320013031 - 2¹ = 20320013029 is a prime.

It is a super-2 number, since 2×20320013031² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20320013031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20320013033) 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, 155550 + ... + 254628.

It is an arithmetic number, because the mean of its divisors is an integer number (1709130000).

Almost surely, 2^20320013031 is an apocalyptic number.

20320013031 is a deficient number, since it is larger than the sum of its proper divisors (7026066969).

20320013031 is a wasteful number, since it uses less digits than its factorization.

20320013031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99718.

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 20320013031 its reverse (13031002302), we get a palindrome (33351015333).

The spelling of 20320013031 in words is "twenty billion, three hundred twenty million, thirteen thousand, thirty-one".