13008918631 has 4 divisors (see below), whose sum is σ = 13009167352. Its totient is φ = 13008669912.

The previous prime is 13008918607. The next prime is 13008918667. The reversal of 13008918631 is 13681980031.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13008918631 - 2⁵ = 13008918599 is a prime.

It is a super-2 number, since 2×13008918631² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13008918731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12165 + ... + 161758.

It is an arithmetic number, because the mean of its divisors is an integer number (3252291838).

Almost surely, 2^13008918631 is an apocalyptic number.

13008918631 is a deficient number, since it is larger than the sum of its proper divisors (248721).

13008918631 is an equidigital number, since it uses as much as digits as its factorization.

13008918631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248720.

The product of its (nonzero) digits is 31104, while the sum is 40.

The spelling of 13008918631 in words is "thirteen billion, eight million, nine hundred eighteen thousand, six hundred thirty-one".