21379792 has 20 divisors (see below), whose sum is σ = 47341216. Its totient is φ = 9162720.

The previous prime is 21379763. The next prime is 21379817. The reversal of 21379792 is 29797312.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95334 + ... + 95557.

Almost surely, 2^21379792 is an apocalyptic number.

It is an amenable number.

21379792 is an abundant number, since it is smaller than the sum of its proper divisors (25961424).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21379792 is a wasteful number, since it uses less digits than its factorization.

21379792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190906 (or 190900 counting only the distinct ones).

The product of its digits is 47628, while the sum is 40.

The square root of 21379792 is about 4623.8287165508. The cubic root of 21379792 is about 277.5456927708.

The spelling of 21379792 in words is "twenty-one million, three hundred seventy-nine thousand, seven hundred ninety-two".