18063920 has 40 divisors (see below), whose sum is σ = 47999904. Its totient is φ = 6193152.

The previous prime is 18063919. The next prime is 18063943. The reversal of 18063920 is 2936081.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15569 + ... + 16688.

Almost surely, 2^18063920 is an apocalyptic number.

18063920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18063920 is an abundant number, since it is smaller than the sum of its proper divisors (29935984).

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

18063920 is a wasteful number, since it uses less digits than its factorization.

18063920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32277 (or 32271 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 18063920 is about 4250.1670555403. The cubic root of 18063920 is about 262.3839910667.

The spelling of 18063920 in words is "eighteen million, sixty-three thousand, nine hundred twenty".