13620402631 has 12 divisors (see below), whose sum is σ = 14977687536. Its totient is φ = 12376807520.

The previous prime is 13620402617. The next prime is 13620402701.

13620402631 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 13620402631 - 2⁹ = 13620402119 is a prime.

It is a super-2 number, since 2×13620402631² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13620402631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13620402611) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 269955 + ... + 316411.

It is an arithmetic number, because the mean of its divisors is an integer number (1248140628).

Almost surely, 2^13620402631 is an apocalyptic number.

13620402631 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13620402631 is a deficient number, since it is larger than the sum of its proper divisors (1357284905).

13620402631 is a wasteful number, since it uses less digits than its factorization.

13620402631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48902 (or 48891 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 28.

The spelling of 13620402631 in words is "thirteen billion, six hundred twenty million, four hundred two thousand, six hundred thirty-one".