18972095319 has 20 divisors (see below), whose sum is σ = 30008152944. Its totient is φ = 11904058944.

The previous prime is 18972095297. The next prime is 18972095347. The reversal of 18972095319 is 91359027981.

18972095319 is a `hidden beast` number, since 1 + 89 + 7 + 20 + 9 + 531 + 9 = 666.

It is not a de Polignac number, because 18972095319 - 2⁸ = 18972095063 is a prime.

It is a super-2 number, since 2×18972095319² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18972093319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6887547 + ... + 6890300.

Almost surely, 2^18972095319 is an apocalyptic number.

18972095319 is a deficient number, since it is larger than the sum of its proper divisors (11036057625).

18972095319 is a wasteful number, since it uses less digits than its factorization.

18972095319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13777876 (or 13777867 counting only the distinct ones).

The product of its (nonzero) digits is 1224720, while the sum is 54.

The spelling of 18972095319 in words is "eighteen billion, nine hundred seventy-two million, ninety-five thousand, three hundred nineteen".