21662422 has 16 divisors (see below), whose sum is σ = 33145200. Its totient is φ = 10616320.

The previous prime is 21662393. The next prime is 21662447. The reversal of 21662422 is 22426612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22854 + ... + 23782.

It is an arithmetic number, because the mean of its divisors is an integer number (2071575).

Almost surely, 2^21662422 is an apocalyptic number.

21662422 is a deficient number, since it is larger than the sum of its proper divisors (11482778).

21662422 is a wasteful number, since it uses less digits than its factorization.

21662422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1151.

The product of its digits is 2304, while the sum is 25.

The square root of 21662422 is about 4654.2907085828. The cubic root of 21662422 is about 278.7633472397.

The spelling of 21662422 in words is "twenty-one million, six hundred sixty-two thousand, four hundred twenty-two".