16809013431 has 32 divisors (see below), whose sum is σ = 28573171200. Its totient is φ = 9566856000.

The previous prime is 16809013421. The next prime is 16809013439. The reversal of 16809013431 is 13431090861.

It is not a de Polignac number, because 16809013431 - 2⁹ = 16809012919 is a prime.

It is a super-2 number, since 2×16809013431² (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 (16809013439) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 129726 + ... + 224603.

It is an arithmetic number, because the mean of its divisors is an integer number (892911600).

Almost surely, 2^16809013431 is an apocalyptic number.

16809013431 is a deficient number, since it is larger than the sum of its proper divisors (11764157769).

16809013431 is a wasteful number, since it uses less digits than its factorization.

16809013431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354596 (or 354590 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The spelling of 16809013431 in words is "sixteen billion, eight hundred nine million, thirteen thousand, four hundred thirty-one".