18625909198 has 32 divisors (see below), whose sum is σ = 30390544800. Its totient is φ = 8510520960.

The previous prime is 18625909163. The next prime is 18625909207. The reversal of 18625909198 is 89190952681.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1181488 + ... + 1197148.

It is an arithmetic number, because the mean of its divisors is an integer number (949704525).

Almost surely, 2^18625909198 is an apocalyptic number.

18625909198 is a deficient number, since it is larger than the sum of its proper divisors (11764635602).

18625909198 is a wasteful number, since it uses less digits than its factorization.

18625909198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16132.

The product of its (nonzero) digits is 2799360, while the sum is 58.

The spelling of 18625909198 in words is "eighteen billion, six hundred twenty-five million, nine hundred nine thousand, one hundred ninety-eight".