18930171222 has 24 divisors (see below), whose sum is σ = 41577228264. Its totient is φ = 6223617504.

The previous prime is 18930171209. The next prime is 18930171289. The reversal of 18930171222 is 22217103981.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7201948 + ... + 7204575.

It is an arithmetic number, because the mean of its divisors is an integer number (1732384511).

Almost surely, 2^18930171222 is an apocalyptic number.

18930171222 is an abundant number, since it is smaller than the sum of its proper divisors (22647057042).

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

18930171222 is a wasteful number, since it uses less digits than its factorization.

18930171222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14406604 (or 14406601 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The spelling of 18930171222 in words is "eighteen billion, nine hundred thirty million, one hundred seventy-one thousand, two hundred twenty-two".