18947926198 has 32 divisors (see below), whose sum is σ = 30510691200. Its totient is φ = 8793982080.

The previous prime is 18947926159. The next prime is 18947926199. The reversal of 18947926198 is 89162974981.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18947926199) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 712953 + ... + 739051.

It is an arithmetic number, because the mean of its divisors is an integer number (953459100).

Almost surely, 2^18947926198 is an apocalyptic number.

18947926198 is a deficient number, since it is larger than the sum of its proper divisors (11562765002).

18947926198 is a wasteful number, since it uses less digits than its factorization.

18947926198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26412.

The product of its digits is 15676416, while the sum is 64.

The spelling of 18947926198 in words is "eighteen billion, nine hundred forty-seven million, nine hundred twenty-six thousand, one hundred ninety-eight".