20474564931 has 6 divisors (see below), whose sum is σ = 29574371580. Its totient is φ = 13649709948.

The previous prime is 20474564917. The next prime is 20474564987. The reversal of 20474564931 is 13946547402.

It is not a de Polignac number, because 20474564931 - 2¹¹ = 20474562883 is a prime.

It is a super-2 number, since 2×20474564931² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20474564911) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1137475821 + ... + 1137475838.

It is an arithmetic number, because the mean of its divisors is an integer number (4929061930).

Almost surely, 2^20474564931 is an apocalyptic number.

20474564931 is a deficient number, since it is larger than the sum of its proper divisors (9099806649).

20474564931 is a wasteful number, since it uses less digits than its factorization.

20474564931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2274951665 (or 2274951662 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

The spelling of 20474564931 in words is "twenty billion, four hundred seventy-four million, five hundred sixty-four thousand, nine hundred thirty-one".