13820694531 has 32 divisors (see below), whose sum is σ = 21253959168. Its totient is φ = 7825144320.

The previous prime is 13820694521. The next prime is 13820694533. The reversal of 13820694531 is 13549602831.

It is not a de Polignac number, because 13820694531 - 2²² = 13816500227 is a prime.

It is a super-2 number, since 2×13820694531² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13820694533) 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, 1147561 + ... + 1159541.

It is an arithmetic number, because the mean of its divisors is an integer number (664186224).

Almost surely, 2^13820694531 is an apocalyptic number.

13820694531 is a deficient number, since it is larger than the sum of its proper divisors (7433264637).

13820694531 is a wasteful number, since it uses less digits than its factorization.

13820694531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12491.

The product of its (nonzero) digits is 155520, while the sum is 42.

The spelling of 13820694531 in words is "thirteen billion, eight hundred twenty million, six hundred ninety-four thousand, five hundred thirty-one".