21732322 has 4 divisors (see below), whose sum is σ = 32598486. Its totient is φ = 10866160.

The previous prime is 21732317. The next prime is 21732323. The reversal of 21732322 is 22323712.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 18567481 + 3164841 = 4309^2 + 1779^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21732293 and 21732302.

It is not an unprimeable number, because it can be changed into a prime (21732323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5433079 + ... + 5433082.

Almost surely, 2^21732322 is an apocalyptic number.

21732322 is a deficient number, since it is larger than the sum of its proper divisors (10866164).

21732322 is a wasteful number, since it uses less digits than its factorization.

21732322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10866163.

The product of its digits is 1008, while the sum is 22.

The square root of 21732322 is about 4661.7938607364. The cubic root of 21732322 is about 279.0628618691.

The spelling of 21732322 in words is "twenty-one million, seven hundred thirty-two thousand, three hundred twenty-two".