18572020 has 24 divisors (see below), whose sum is σ = 39664800. Its totient is φ = 7302432.

The previous prime is 18572011. The next prime is 18572077. The reversal of 18572020 is 2027581.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6690 + ... + 9049.

It is an arithmetic number, because the mean of its divisors is an integer number (1652700).

Almost surely, 2^18572020 is an apocalyptic number.

18572020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18572020 is an abundant number, since it is smaller than the sum of its proper divisors (21092780).

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

18572020 is a wasteful number, since it uses less digits than its factorization.

18572020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15807 (or 15805 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 18572020 is about 4309.5266561422. The cubic root of 18572020 is about 264.8213819470.

The spelling of 18572020 in words is "eighteen million, five hundred seventy-two thousand, twenty".