18084920 has 48 divisors (see below), whose sum is σ = 47339640. Its totient is φ = 6199872.

The previous prime is 18084919. The next prime is 18084949. The reversal of 18084920 is 2948081.

It is a happy number.

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, 2654 + ... + 6573.

Almost surely, 2^18084920 is an apocalyptic number.

18084920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18084920 is an abundant number, since it is smaller than the sum of its proper divisors (29254720).

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

18084920 is a wasteful number, since it uses less digits than its factorization.

18084920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9252 (or 9241 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 18084920 is about 4252.6368290744. The cubic root of 18084920 is about 262.4856288429.

The spelling of 18084920 in words is "eighteen million, eighty-four thousand, nine hundred twenty".