21402882 has 24 divisors (see below), whose sum is σ = 47067696. Its totient is φ = 7027416.

The previous prime is 21402877. The next prime is 21402893. The reversal of 21402882 is 28820412.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7668 + ... + 10079.

It is an arithmetic number, because the mean of its divisors is an integer number (1961154).

Almost surely, 2^21402882 is an apocalyptic number.

21402882 is an abundant number, since it is smaller than the sum of its proper divisors (25664814).

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

21402882 is a wasteful number, since it uses less digits than its factorization.

21402882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17822 (or 17819 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The square root of 21402882 is about 4626.3248913149. The cubic root of 21402882 is about 277.6455725135.

The spelling of 21402882 in words is "twenty-one million, four hundred two thousand, eight hundred eighty-two".