21104792 has 16 divisors (see below), whose sum is σ = 39810960. Its totient is φ = 10488544.

The previous prime is 21104773. The next prime is 21104819. The reversal of 21104792 is 29740112.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6563 + ... + 9234.

It is an arithmetic number, because the mean of its divisors is an integer number (2488185).

Almost surely, 2^21104792 is an apocalyptic number.

It is an amenable number.

21104792 is a deficient number, since it is larger than the sum of its proper divisors (18706168).

21104792 is a wasteful number, since it uses less digits than its factorization.

21104792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15970 (or 15966 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 21104792 is about 4593.9952111425. The cubic root of 21104792 is about 276.3505662259.

The spelling of 21104792 in words is "twenty-one million, one hundred four thousand, seven hundred ninety-two".