22539020 has 72 divisors (see below), whose sum is σ = 55828080. Its totient is φ = 7620480.

The previous prime is 22538987. The next prime is 22539067. The reversal of 22539020 is 2093522.

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, 106715 + ... + 106925.

It is an arithmetic number, because the mean of its divisors is an integer number (775390).

Almost surely, 2^22539020 is an apocalyptic number.

22539020 is a gapful number since it is divisible by the number (20) 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 22539020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27914040).

22539020 is an abundant number, since it is smaller than the sum of its proper divisors (33289060).

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

22539020 is a wasteful number, since it uses less digits than its factorization.

22539020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343 (or 334 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 22539020 is about 4747.5277776965. The cubic root of 22539020 is about 282.4739109747.

The spelling of 22539020 in words is "twenty-two million, five hundred thirty-nine thousand, twenty".