21335922 has 12 divisors (see below), whose sum is σ = 46227870. Its totient is φ = 7111968.

The previous prime is 21335911. The next prime is 21335953. The reversal of 21335922 is 22953312.

It can be written as a sum of positive squares in only one way, i.e., 16232841 + 5103081 = 4029^2 + 2259^2 .

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 5 ways as a sum of consecutive naturals, for example, 592647 + ... + 592682.

Almost surely, 2^21335922 is an apocalyptic number.

21335922 is an abundant number, since it is smaller than the sum of its proper divisors (24891948).

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

21335922 is a wasteful number, since it uses less digits than its factorization.

21335922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1185337 (or 1185334 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 21335922 is about 4619.0823764033. The cubic root of 21335922 is about 277.3557272942.

The spelling of 21335922 in words is "twenty-one million, three hundred thirty-five thousand, nine hundred twenty-two".