21924960 has 48 divisors (see below), whose sum is σ = 69065136. Its totient is φ = 5846528.

The previous prime is 21924953. The next prime is 21924961. The reversal of 21924960 is 6942912.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21924961) 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, 22359 + ... + 23318.

It is an arithmetic number, because the mean of its divisors is an integer number (1438857).

Almost surely, 2^21924960 is an apocalyptic number.

21924960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21924960 is an abundant number, since it is smaller than the sum of its proper divisors (47140176).

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

21924960 is a wasteful number, since it uses less digits than its factorization.

21924960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45695 (or 45687 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 21924960 is about 4682.4096360741. The cubic root of 21924960 is about 279.8849867771.

The spelling of 21924960 in words is "twenty-one million, nine hundred twenty-four thousand, nine hundred sixty".