21952960 has 56 divisors (see below), whose sum is σ = 53986176. Its totient is φ = 8494080.

The previous prime is 21952939. The next prime is 21952963. The reversal of 21952960 is 6925912.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21952963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8814 + ... + 11026.

Almost surely, 2^21952960 is an apocalyptic number.

21952960 is a gapful number since it is divisible by the number (20) 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 21952960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26993088).

21952960 is an abundant number, since it is smaller than the sum of its proper divisors (32033216).

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

21952960 is a wasteful number, since it uses less digits than its factorization.

21952960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2261 (or 2251 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 21952960 is about 4685.3985956373. The cubic root of 21952960 is about 280.0040815732.

The spelling of 21952960 in words is "twenty-one million, nine hundred fifty-two thousand, nine hundred sixty".