21896960 has 36 divisors (see below), whose sum is σ = 52453128. Its totient is φ = 8758272.

The previous prime is 21896951. The next prime is 21896999. The reversal of 21896960 is 6969812.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7274 + ... + 9833.

Almost surely, 2^21896960 is an apocalyptic number.

21896960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21896960 is an abundant number, since it is smaller than the sum of its proper divisors (30556168).

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

21896960 is an equidigital number, since it uses as much as digits as its factorization.

21896960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17128 (or 17114 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 21896960 is about 4679.4187673257. The cubic root of 21896960 is about 279.7657905418.

The spelling of 21896960 in words is "twenty-one million, eight hundred ninety-six thousand, nine hundred sixty".