21926374 has 8 divisors (see below), whose sum is σ = 32975280. Its totient is φ = 10934616.

The previous prime is 21926369. The next prime is 21926381. The reversal of 21926374 is 47362912.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13314 + ... + 14869.

It is an arithmetic number, because the mean of its divisors is an integer number (4121910).

Almost surely, 2^21926374 is an apocalyptic number.

21926374 is a deficient number, since it is larger than the sum of its proper divisors (11048906).

21926374 is a wasteful number, since it uses less digits than its factorization.

21926374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28574.

The product of its digits is 18144, while the sum is 34.

The square root of 21926374 is about 4682.5606242739. The cubic root of 21926374 is about 279.8910034945.

The spelling of 21926374 in words is "twenty-one million, nine hundred twenty-six thousand, three hundred seventy-four".