21922708 has 12 divisors (see below), whose sum is σ = 39088980. Its totient is φ = 10754432.

The previous prime is 21922699. The next prime is 21922709. The reversal of 21922708 is 80722912.

It can be written as a sum of positive squares in 2 ways, for example, as 13089924 + 8832784 = 3618^2 + 2972^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21922708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21922709) 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 3 ways as a sum of consecutive naturals, for example, 51493 + ... + 51916.

It is an arithmetic number, because the mean of its divisors is an integer number (3257415).

Almost surely, 2^21922708 is an apocalyptic number.

It is an amenable number.

21922708 is a deficient number, since it is larger than the sum of its proper divisors (17166272).

21922708 is a wasteful number, since it uses less digits than its factorization.

21922708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103466 (or 103464 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 21922708 is about 4682.1691554236. The cubic root of 21922708 is about 279.8754037482.

It can be divided in two parts, 2192 and 2708, that added together give a square (4900 = 70²).

The spelling of 21922708 in words is "twenty-one million, nine hundred twenty-two thousand, seven hundred eight".