22721374 has 16 divisors (see below), whose sum is σ = 36928080. Its totient is φ = 10484760.

The previous prime is 22721353. The next prime is 22721381. The reversal of 22721374 is 47312722.

It is a Smith number, since the sum of its digits (28) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1809 + ... + 6979.

It is an arithmetic number, because the mean of its divisors is an integer number (2308005).

Almost surely, 2^22721374 is an apocalyptic number.

22721374 is a deficient number, since it is larger than the sum of its proper divisors (14206706).

22721374 is an equidigital number, since it uses as much as digits as its factorization.

22721374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5212 (or 5186 counting only the distinct ones).

The product of its digits is 4704, while the sum is 28.

The square root of 22721374 is about 4766.6942423445. The cubic root of 22721374 is about 283.2336593650.

The spelling of 22721374 in words is "twenty-two million, seven hundred twenty-one thousand, three hundred seventy-four".