21373222 has 16 divisors (see below), whose sum is σ = 35113680. Its totient is φ = 9696672.

The previous prime is 21373207. The next prime is 21373223. The reversal of 21373222 is 22237312.

It is a super-2 number, since 2×21373222² = 913629237322568, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21373193 and 21373202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21373223) 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, 5433 + ... + 8500.

It is an arithmetic number, because the mean of its divisors is an integer number (2194605).

Almost surely, 2^21373222 is an apocalyptic number.

21373222 is a deficient number, since it is larger than the sum of its proper divisors (13740458).

21373222 is a wasteful number, since it uses less digits than its factorization.

21373222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14007.

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

The square root of 21373222 is about 4623.1182117701. The cubic root of 21373222 is about 277.5172599713.

The spelling of 21373222 in words is "twenty-one million, three hundred seventy-three thousand, two hundred twenty-two".