13947474931 has 16 divisors (see below), whose sum is σ = 15170851584. Its totient is φ = 12745760544.

The previous prime is 13947474929. The next prime is 13947475021.

13947474931 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 13947474931 - 2¹ = 13947474929 is a prime.

It is a super-2 number, since 2×13947474931² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13947474901) 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, 3151186 + ... + 3155608.

It is an arithmetic number, because the mean of its divisors is an integer number (948178224).

Almost surely, 2^13947474931 is an apocalyptic number.

13947474931 is a deficient number, since it is larger than the sum of its proper divisors (1223376653).

13947474931 is a wasteful number, since it uses less digits than its factorization.

13947474931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6810.

The product of its digits is 2286144, while the sum is 52.

The spelling of 13947474931 in words is "thirteen billion, nine hundred forty-seven million, four hundred seventy-four thousand, nine hundred thirty-one".