18392412731 has 24 divisors (see below), whose sum is σ = 23496184320. Its totient is φ = 14088800880.

The previous prime is 18392412713. The next prime is 18392412733. The reversal of 18392412731 is 13721429381.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-18392412731 is a prime.

It is a super-2 number, since 2×18392412731² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18392412733) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 134051 + ... + 233996.

It is an arithmetic number, because the mean of its divisors is an integer number (979007680).

Almost surely, 2^18392412731 is an apocalyptic number.

18392412731 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

18392412731 is a deficient number, since it is larger than the sum of its proper divisors (5103771589).

18392412731 is a wasteful number, since it uses less digits than its factorization.

18392412731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368135 (or 368124 counting only the distinct ones).

The product of its digits is 72576, while the sum is 41.

The spelling of 18392412731 in words is "eighteen billion, three hundred ninety-two million, four hundred twelve thousand, seven hundred thirty-one".