18371020 has 24 divisors (see below), whose sum is σ = 40257504. Its totient is φ = 7028736.

The previous prime is 18370987. The next prime is 18371021. The reversal of 18371020 is 2017381.

It is a junction number, because it is equal to n+sod(n) for n = 18370982 and 18371000.

It is not an unprimeable number, because it can be changed into a prime (18371021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19509 + ... + 20428.

It is an arithmetic number, because the mean of its divisors is an integer number (1677396).

Almost surely, 2^18371020 is an apocalyptic number.

18371020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18371020 is an abundant number, since it is smaller than the sum of its proper divisors (21886484).

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

18371020 is a wasteful number, since it uses less digits than its factorization.

18371020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39969 (or 39967 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 18371020 is about 4286.1427881021. The cubic root of 18371020 is about 263.8625508873.

The spelling of 18371020 in words is "eighteen million, three hundred seventy-one thousand, twenty".