21954732 has 24 divisors (see below), whose sum is σ = 51878400. Its totient is φ = 7225296.

The previous prime is 21954731. The next prime is 21954763. The reversal of 21954732 is 23745912.

It is a junction number, because it is equal to n+sod(n) for n = 21954693 and 21954702.

It is not an unprimeable number, because it can be changed into a prime (21954731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10632 + ... + 12527.

It is an arithmetic number, because the mean of its divisors is an integer number (2161600).

Almost surely, 2^21954732 is an apocalyptic number.

It is an amenable number.

21954732 is an abundant number, since it is smaller than the sum of its proper divisors (29923668).

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

21954732 is a wasteful number, since it uses less digits than its factorization.

21954732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23245 (or 23243 counting only the distinct ones).

The product of its digits is 15120, while the sum is 33.

The square root of 21954732 is about 4685.5876899275. The cubic root of 21954732 is about 280.0116151644.

The spelling of 21954732 in words is "twenty-one million, nine hundred fifty-four thousand, seven hundred thirty-two".