22517980 has 12 divisors (see below), whose sum is σ = 47287800. Its totient is φ = 9007184.

The previous prime is 22517969. The next prime is 22517981. The reversal of 22517980 is 8971522.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22517981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 562930 + ... + 562969.

It is an arithmetic number, because the mean of its divisors is an integer number (3940650).

Almost surely, 2^22517980 is an apocalyptic number.

22517980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22517980 is an abundant number, since it is smaller than the sum of its proper divisors (24769820).

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

22517980 is a wasteful number, since it uses less digits than its factorization.

22517980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1125908 (or 1125906 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 22517980 is about 4745.3113701843. The cubic root of 22517980 is about 282.3859878770.

The spelling of 22517980 in words is "twenty-two million, five hundred seventeen thousand, nine hundred eighty".