18998122 has 32 divisors (see below), whose sum is σ = 33755904. Its totient is φ = 7905600.

The previous prime is 18998113. The next prime is 18998141. The reversal of 18998122 is 22189981.

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, 51583 + ... + 51949.

It is an arithmetic number, because the mean of its divisors is an integer number (1054872).

Almost surely, 2^18998122 is an apocalyptic number.

18998122 is a deficient number, since it is larger than the sum of its proper divisors (14757782).

18998122 is a wasteful number, since it uses less digits than its factorization.

18998122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574.

The product of its digits is 20736, while the sum is 40.

The square root of 18998122 is about 4358.6835168431. The cubic root of 18998122 is about 266.8313729013.

The spelling of 18998122 in words is "eighteen million, nine hundred ninety-eight thousand, one hundred twenty-two".