18904022 has 16 divisors (see below), whose sum is σ = 30078432. Its totient is φ = 8891520.

The previous prime is 18904021. The next prime is 18904033. The reversal of 18904022 is 22040981.

It is a junction number, because it is equal to n+sod(n) for n = 18903982 and 18904000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18904021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 563 + ... + 6174.

It is an arithmetic number, because the mean of its divisors is an integer number (1879902).

Almost surely, 2^18904022 is an apocalyptic number.

18904022 is a deficient number, since it is larger than the sum of its proper divisors (11174410).

18904022 is a wasteful number, since it uses less digits than its factorization.

18904022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6823.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 18904022 is about 4347.8755731966. The cubic root of 18904022 is about 266.3900941556.

The spelling of 18904022 in words is "eighteen million, nine hundred four thousand, twenty-two".