18397901942 has 64 divisors (see below), whose sum is σ = 34053208704. Its totient is φ = 7275847680.

The previous prime is 18397901939. The next prime is 18397901971. The reversal of 18397901942 is 24910979381.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3002642 + ... + 3008762.

It is an arithmetic number, because the mean of its divisors is an integer number (532081386).

Almost surely, 2^18397901942 is an apocalyptic number.

18397901942 is a deficient number, since it is larger than the sum of its proper divisors (15655306762).

18397901942 is a wasteful number, since it uses less digits than its factorization.

18397901942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6393.

The product of its (nonzero) digits is 979776, while the sum is 53.

The spelling of 18397901942 in words is "eighteen billion, three hundred ninety-seven million, nine hundred one thousand, nine hundred forty-two".