22581980 has 24 divisors (see below), whose sum is σ = 48580560. Its totient is φ = 8812160.

The previous prime is 22581973. The next prime is 22581983. The reversal of 22581980 is 8918522.

It is a self number, because there is not a number n which added to its sum of digits gives 22581980.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22581983) 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, 12950 + ... + 14589.

It is an arithmetic number, because the mean of its divisors is an integer number (2024190).

Almost surely, 2^22581980 is an apocalyptic number.

22581980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22581980 is an abundant number, since it is smaller than the sum of its proper divisors (25998580).

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

22581980 is a wasteful number, since it uses less digits than its factorization.

22581980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27589 (or 27587 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 22581980 is about 4752.0500839112. The cubic root of 22581980 is about 282.6532647863.

The spelling of 22581980 in words is "twenty-two million, five hundred eighty-one thousand, nine hundred eighty".