18160920 has 96 divisors (see below), whose sum is σ = 60063120. Its totient is φ = 4757760.

The previous prime is 18160907. The next prime is 18160949. The reversal of 18160920 is 2906181.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21547 + ... + 22373.

Almost surely, 2^18160920 is an apocalyptic number.

18160920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18160920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30031560).

18160920 is an abundant number, since it is smaller than the sum of its proper divisors (41902200).

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

18160920 is a wasteful number, since it uses less digits than its factorization.

18160920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 905 (or 898 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 18160920 is about 4261.5630935139. The cubic root of 18160920 is about 262.8528045238.

The spelling of 18160920 in words is "eighteen million, one hundred sixty thousand, nine hundred twenty".