21882620 has 12 divisors (see below), whose sum is σ = 45953544. Its totient is φ = 8753040.

The previous prime is 21882613. The next prime is 21882667. The reversal of 21882620 is 2628812.

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, 547046 + ... + 547085.

It is an arithmetic number, because the mean of its divisors is an integer number (3829462).

Almost surely, 2^21882620 is an apocalyptic number.

21882620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21882620 is an abundant number, since it is smaller than the sum of its proper divisors (24070924).

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

21882620 is a wasteful number, since it uses less digits than its factorization.

21882620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1094140 (or 1094138 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 21882620 is about 4677.8862748040. The cubic root of 21882620 is about 279.7047056923.

The spelling of 21882620 in words is "twenty-one million, eight hundred eighty-two thousand, six hundred twenty".