21796722 has 32 divisors (see below), whose sum is σ = 48692160. Its totient is φ = 7227360.

The previous prime is 21796717. The next prime is 21796739. The reversal of 21796722 is 22769712.

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 15 ways as a sum of consecutive naturals, for example, 10438 + ... + 12350.

It is an arithmetic number, because the mean of its divisors is an integer number (1521630).

Almost surely, 2^21796722 is an apocalyptic number.

21796722 is an abundant number, since it is smaller than the sum of its proper divisors (26895438).

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

21796722 is a wasteful number, since it uses less digits than its factorization.

21796722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2135 (or 2129 counting only the distinct ones).

The product of its digits is 21168, while the sum is 36.

The square root of 21796722 is about 4668.6959635427. The cubic root of 21796722 is about 279.3382416392.

The spelling of 21796722 in words is "twenty-one million, seven hundred ninety-six thousand, seven hundred twenty-two".