18808215713 has 12 divisors (see below), whose sum is σ = 21893802372. Its totient is φ = 16110380160.

The previous prime is 18808215709. The next prime is 18808215733. The reversal of 18808215713 is 31751280881.

It can be written as a sum of positive squares in 2 ways, for example, as 7877095009 + 10931120704 = 88753^2 + 104552^2 .

It is not a de Polignac number, because 18808215713 - 2² = 18808215709 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18808215733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57020 + ... + 202157.

It is an arithmetic number, because the mean of its divisors is an integer number (1824483531).

Almost surely, 2^18808215713 is an apocalyptic number.

It is an amenable number.

18808215713 is a deficient number, since it is larger than the sum of its proper divisors (3085586659).

18808215713 is a wasteful number, since it uses less digits than its factorization.

18808215713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260672 (or 260665 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 44.

The spelling of 18808215713 in words is "eighteen billion, eight hundred eight million, two hundred fifteen thousand, seven hundred thirteen".