20325572931 has 4 divisors (see below), whose sum is σ = 27100763912. Its totient is φ = 13550381952.

The previous prime is 20325572899. The next prime is 20325572977. The reversal of 20325572931 is 13927552302.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20325572931 - 2⁵ = 20325572899 is a prime.

It is a super-2 number, since 2×20325572931² (a number of 21 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 20325572931.

It is not an unprimeable number, because it can be changed into a prime (20325572131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3387595486 + ... + 3387595491.

It is an arithmetic number, because the mean of its divisors is an integer number (6775190978).

Almost surely, 2^20325572931 is an apocalyptic number.

20325572931 is a deficient number, since it is larger than the sum of its proper divisors (6775190981).

20325572931 is an equidigital number, since it uses as much as digits as its factorization.

20325572931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6775190980.

The product of its (nonzero) digits is 113400, while the sum is 39.

The spelling of 20325572931 in words is "twenty billion, three hundred twenty-five million, five hundred seventy-two thousand, nine hundred thirty-one".