16939207431 has 8 divisors (see below), whose sum is σ = 25095122160. Its totient is φ = 11292804936.

The previous prime is 16939207421. The next prime is 16939207433. The reversal of 16939207431 is 13470293961.

16939207431 is a `hidden beast` number, since 1 + 6 + 9 + 3 + 9 + 207 + 431 = 666.

It is not a de Polignac number, because 16939207431 - 2⁹ = 16939206919 is a prime.

It is a super-2 number, since 2×16939207431² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16939207433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 313689000 + ... + 313689053.

It is an arithmetic number, because the mean of its divisors is an integer number (3136890270).

Almost surely, 2^16939207431 is an apocalyptic number.

16939207431 is a deficient number, since it is larger than the sum of its proper divisors (8155914729).

16939207431 is an equidigital number, since it uses as much as digits as its factorization.

16939207431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627378062 (or 627378056 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The spelling of 16939207431 in words is "sixteen billion, nine hundred thirty-nine million, two hundred seven thousand, four hundred thirty-one".