21440922 has 32 divisors (see below), whose sum is σ = 44997120. Its totient is φ = 6798000.

The previous prime is 21440917. The next prime is 21440941. The reversal of 21440922 is 22904412.

It is a junction number, because it is equal to n+sod(n) for n = 21440892 and 21440901.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34329 + ... + 34947.

It is an arithmetic number, because the mean of its divisors is an integer number (1406160).

Almost surely, 2^21440922 is an apocalyptic number.

21440922 is an abundant number, since it is smaller than the sum of its proper divisors (23556198).

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

21440922 is a wasteful number, since it uses less digits than its factorization.

21440922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 898.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 21440922 is about 4630.4343208818. The cubic root of 21440922 is about 277.8099644955.

The spelling of 21440922 in words is "twenty-one million, four hundred forty thousand, nine hundred twenty-two".