21622732 has 12 divisors (see below), whose sum is σ = 37908360. Its totient is φ = 10791776.

The previous prime is 21622723. The next prime is 21622739. The reversal of 21622732 is 23722612.

It is a junction number, because it is equal to n+sod(n) for n = 21622697 and 21622706.

It is not an unprimeable number, because it can be changed into a prime (21622739) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2257 + ... + 6952.

It is an arithmetic number, because the mean of its divisors is an integer number (3159030).

Almost surely, 2^21622732 is an apocalyptic number.

It is an amenable number.

21622732 is a deficient number, since it is larger than the sum of its proper divisors (16285628).

21622732 is a wasteful number, since it uses less digits than its factorization.

21622732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9800 (or 9798 counting only the distinct ones).

The product of its digits is 2016, while the sum is 25.

The square root of 21622732 is about 4650.0249461696. The cubic root of 21622732 is about 278.5929926139.

The spelling of 21622732 in words is "twenty-one million, six hundred twenty-two thousand, seven hundred thirty-two".