21232960 has 56 divisors (see below), whose sum is σ = 57790080. Its totient is φ = 7279104.

The previous prime is 21232943. The next prime is 21232963. The reversal of 21232960 is 6923212.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (56).

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21232963) 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, 2500 + ... + 6979.

Almost surely, 2^21232960 is an apocalyptic number.

21232960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21232960 is an abundant number, since it is smaller than the sum of its proper divisors (36557120).

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

21232960 is an equidigital number, since it uses as much as digits as its factorization.

21232960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9503 (or 9493 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 21232960 is about 4607.9236104779. The cubic root of 21232960 is about 276.9088571363.

The spelling of 21232960 in words is "twenty-one million, two hundred thirty-two thousand, nine hundred sixty".