18363720504 has 16 divisors (see below), whose sum is σ = 45909301320. Its totient is φ = 6121240160.

The previous prime is 18363720503. The next prime is 18363720509. The reversal of 18363720504 is 40502736381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18363720503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 382577487 + ... + 382577534.

Almost surely, 2^18363720504 is an apocalyptic number.

It is an amenable number.

18363720504 is an abundant number, since it is smaller than the sum of its proper divisors (27545580816).

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

18363720504 is a wasteful number, since it uses less digits than its factorization.

18363720504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 765155030 (or 765155026 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 39.

The spelling of 18363720504 in words is "eighteen billion, three hundred sixty-three million, seven hundred twenty thousand, five hundred four".