18875940378215 has 16 divisors (see below), whose sum is σ = 22783227643296. Its totient is φ = 15012695126400.

The previous prime is 18875940378179. The next prime is 18875940378223. The reversal of 18875940378215 is 51287304957881.

It is a de Polignac number, because none of the positive numbers 2^k-18875940378215 is a prime.

It is a super-2 number, since 2×18875940378215² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16630400 + ... + 17729130.

It is an arithmetic number, because the mean of its divisors is an integer number (1423951727706).

Almost surely, 2^{18875940378215} is an apocalyptic number.

18875940378215 is a deficient number, since it is larger than the sum of its proper divisors (3907287265081).

18875940378215 is a wasteful number, since it uses less digits than its factorization.

18875940378215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1118770.

The product of its (nonzero) digits is 135475200, while the sum is 68.

The spelling of 18875940378215 in words is "eighteen trillion, eight hundred seventy-five billion, nine hundred forty million, three hundred seventy-eight thousand, two hundred fifteen".