21883560 has 64 divisors (see below), whose sum is σ = 67193280. Its totient is φ = 5698560.

The previous prime is 21883559. The next prime is 21883583. The reversal of 21883560 is 6538812.

It is a happy number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 3040 + ... + 7280.

It is an arithmetic number, because the mean of its divisors is an integer number (1049895).

Almost surely, 2^21883560 is an apocalyptic number.

21883560 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 21883560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33596640).

21883560 is an abundant number, since it is smaller than the sum of its proper divisors (45309720).

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

21883560 is a wasteful number, since it uses less digits than its factorization.

21883560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4298 (or 4294 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 21883560 is about 4677.9867464541. The cubic root of 21883560 is about 279.7087106767.

The spelling of 21883560 in words is "twenty-one million, eight hundred eighty-three thousand, five hundred sixty".