21122982 has 24 divisors (see below), whose sum is σ = 45877104. Its totient is φ = 7023984.

The previous prime is 21122971. The next prime is 21123013. The reversal of 21122982 is 28922112.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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, 7888 + ... + 10220.

It is an arithmetic number, because the mean of its divisors is an integer number (1911546).

Almost surely, 2^21122982 is an apocalyptic number.

21122982 is an abundant number, since it is smaller than the sum of its proper divisors (24754122).

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

21122982 is a wasteful number, since it uses less digits than its factorization.

21122982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2844 (or 2841 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 21122982 is about 4595.9745430104. The cubic root of 21122982 is about 276.4299379835.

The spelling of 21122982 in words is "twenty-one million, one hundred twenty-two thousand, nine hundred eighty-two".