18259938994 has 16 divisors (see below), whose sum is σ = 29929638816. Its totient is φ = 8286156000.

The previous prime is 18259938989. The next prime is 18259939007. The reversal of 18259938994 is 49983995281.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 677292 + ... + 703735.

It is an arithmetic number, because the mean of its divisors is an integer number (1870602426).

Almost surely, 2^18259938994 is an apocalyptic number.

18259938994 is a deficient number, since it is larger than the sum of its proper divisors (11669699822).

18259938994 is a wasteful number, since it uses less digits than its factorization.

18259938994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1381641.

The product of its digits is 50388480, while the sum is 67.

The spelling of 18259938994 in words is "eighteen billion, two hundred fifty-nine million, nine hundred thirty-eight thousand, nine hundred ninety-four".