21883660 has 12 divisors (see below), whose sum is σ = 45955728. Its totient is φ = 8753456.

The previous prime is 21883657. The next prime is 21883663. The reversal of 21883660 is 6638812.

It is an interprime number because it is at equal distance from previous prime (21883657) and next prime (21883663).

It is not an unprimeable number, because it can be changed into a prime (21883663) 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 3 ways as a sum of consecutive naturals, for example, 547072 + ... + 547111.

It is an arithmetic number, because the mean of its divisors is an integer number (3829644).

Almost surely, 2^21883660 is an apocalyptic number.

21883660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21883660 is an abundant number, since it is smaller than the sum of its proper divisors (24072068).

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

21883660 is a wasteful number, since it uses less digits than its factorization.

21883660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1094192 (or 1094190 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 21883660 is about 4677.9974348005. The cubic root of 21883660 is about 279.7091367321.

The spelling of 21883660 in words is "twenty-one million, eight hundred eighty-three thousand, six hundred sixty".