22561620 has 48 divisors (see below), whose sum is σ = 65923200. Its totient is φ = 5754496.

The previous prime is 22561613. The next prime is 22561621. The reversal of 22561620 is 2616522.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22561621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6795 + ... + 9554.

It is an arithmetic number, because the mean of its divisors is an integer number (1373400).

Almost surely, 2^22561620 is an apocalyptic number.

22561620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22561620 is an abundant number, since it is smaller than the sum of its proper divisors (43361580).

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

22561620 is a wasteful number, since it uses less digits than its factorization.

22561620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16384 (or 16382 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 22561620 is about 4749.9073675178. The cubic root of 22561620 is about 282.5682921538.

The spelling of 22561620 in words is "twenty-two million, five hundred sixty-one thousand, six hundred twenty".