21922966 has 16 divisors (see below), whose sum is σ = 35658000. Its totient is φ = 10048608.

The previous prime is 21922961. The next prime is 21922969. The reversal of 21922966 is 66922912.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21922961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1045 + ... + 6703.

It is an arithmetic number, because the mean of its divisors is an integer number (2228625).

Almost surely, 2^21922966 is an apocalyptic number.

21922966 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

21922966 is a deficient number, since it is larger than the sum of its proper divisors (13735034).

21922966 is a wasteful number, since it uses less digits than its factorization.

21922966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5823.

The product of its digits is 23328, while the sum is 37.

The square root of 21922966 is about 4682.1967066752. The cubic root of 21922966 is about 279.8765016596.

The spelling of 21922966 in words is "twenty-one million, nine hundred twenty-two thousand, nine hundred sixty-six".