18290515938 has 16 divisors (see below), whose sum is σ = 36631358400. Its totient is φ = 6088450896.

The previous prime is 18290515931. The next prime is 18290515939. The reversal of 18290515938 is 83951509281.

It is not an unprimeable number, because it can be changed into a prime (18290515931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2092213 + ... + 2100936.

It is an arithmetic number, because the mean of its divisors is an integer number (2289459900).

Almost surely, 2^18290515938 is an apocalyptic number.

18290515938 is an abundant number, since it is smaller than the sum of its proper divisors (18340842462).

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

18290515938 is a wasteful number, since it uses less digits than its factorization.

18290515938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4193881.

The product of its (nonzero) digits is 777600, while the sum is 51.

The spelling of 18290515938 in words is "eighteen billion, two hundred ninety million, five hundred fifteen thousand, nine hundred thirty-eight".