22521968 has 60 divisors (see below), whose sum is σ = 53010000. Its totient is φ = 9225216.

The previous prime is 22521931. The next prime is 22521971. The reversal of 22521968 is 86912522.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17408 + ... + 18656.

It is an arithmetic number, because the mean of its divisors is an integer number (883500).

Almost surely, 2^22521968 is an apocalyptic number.

22521968 is a gapful number since it is divisible by the number (28) 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 22521968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26505000).

22521968 is an abundant number, since it is smaller than the sum of its proper divisors (30488032).

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

22521968 is a wasteful number, since it uses less digits than its factorization.

22521968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1294 (or 1281 counting only the distinct ones).

The product of its digits is 17280, while the sum is 35.

The square root of 22521968 is about 4745.7315558299. The cubic root of 22521968 is about 282.4026573539.

The spelling of 22521968 in words is "twenty-two million, five hundred twenty-one thousand, nine hundred sixty-eight".