18345020 has 12 divisors (see below), whose sum is σ = 38524584. Its totient is φ = 7338000.

The previous prime is 18345017. The next prime is 18345031. The reversal of 18345020 is 2054381.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 458606 + ... + 458645.

It is an arithmetic number, because the mean of its divisors is an integer number (3210382).

Almost surely, 2^18345020 is an apocalyptic number.

18345020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18345020 is an abundant number, since it is smaller than the sum of its proper divisors (20179564).

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

18345020 is a wasteful number, since it uses less digits than its factorization.

18345020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 917260 (or 917258 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 18345020 is about 4283.1086841218. The cubic root of 18345020 is about 263.7380129769.

The spelling of 18345020 in words is "eighteen million, three hundred forty-five thousand, twenty".