22540520 has 32 divisors (see below), whose sum is σ = 51217920. Its totient is φ = 8927040.

The previous prime is 22540519. The next prime is 22540547. The reversal of 22540520 is 2504522.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 22540492 and 22540501.

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, 1385 + ... + 6855.

It is an arithmetic number, because the mean of its divisors is an integer number (1600560).

Almost surely, 2^22540520 is an apocalyptic number.

22540520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22540520 is an abundant number, since it is smaller than the sum of its proper divisors (28677400).

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

22540520 is a wasteful number, since it uses less digits than its factorization.

22540520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5585 (or 5581 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 22540520 is about 4747.6857520270. The cubic root of 22540520 is about 282.4801771665.

The spelling of 22540520 in words is "twenty-two million, five hundred forty thousand, five hundred twenty".