21943422 has 24 divisors (see below), whose sum is σ = 47664864. Its totient is φ = 7295904.

The previous prime is 21943421. The next prime is 21943483. The reversal of 21943422 is 22434912.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21943421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7018 + ... + 9650.

It is an arithmetic number, because the mean of its divisors is an integer number (1986036).

Almost surely, 2^21943422 is an apocalyptic number.

21943422 is an abundant number, since it is smaller than the sum of its proper divisors (25721442).

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

21943422 is a wasteful number, since it uses less digits than its factorization.

21943422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3104 (or 3101 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 21943422 is about 4684.3806420913. The cubic root of 21943422 is about 279.9635241600.

The spelling of 21943422 in words is "twenty-one million, nine hundred forty-three thousand, four hundred twenty-two".