21237322 has 8 divisors (see below), whose sum is σ = 31896900. Its totient is φ = 10605024.

The previous prime is 21237319. The next prime is 21237323. The reversal of 21237322 is 22373212.

It can be written as a sum of positive squares in 2 ways, for example, as 21169201 + 68121 = 4601^2 + 261^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21237293 and 21237302.

It is not an unprimeable number, because it can be changed into a prime (21237323) 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, 4747 + ... + 8062.

Almost surely, 2^21237322 is an apocalyptic number.

21237322 is a deficient number, since it is larger than the sum of its proper divisors (10659578).

21237322 is a wasteful number, since it uses less digits than its factorization.

21237322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13640.

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

The square root of 21237322 is about 4608.3969013096. The cubic root of 21237322 is about 276.9278181247.

The spelling of 21237322 in words is "twenty-one million, two hundred thirty-seven thousand, three hundred twenty-two".