18364031406 has 24 divisors (see below), whose sum is σ = 45472839984. Its totient is φ = 5246866080.

The previous prime is 18364031383. The next prime is 18364031447. The reversal of 18364031406 is 60413046381.

It is a happy number.

18364031406 is a `hidden beast` number, since 1 + 8 + 3 + 640 + 3 + 1 + 4 + 0 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72873015 + ... + 72873266.

It is an arithmetic number, because the mean of its divisors is an integer number (1894701666).

Almost surely, 2^18364031406 is an apocalyptic number.

18364031406 is an abundant number, since it is smaller than the sum of its proper divisors (27108808578).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18364031406 is a wasteful number, since it uses less digits than its factorization.

18364031406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145746296 (or 145746293 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

Adding to 18364031406 its reverse (60413046381), we get a palindrome (78777077787).

The spelling of 18364031406 in words is "eighteen billion, three hundred sixty-four million, thirty-one thousand, four hundred six".