21699792 has 40 divisors (see below), whose sum is σ = 62287680. Its totient is φ = 7233120.

The previous prime is 21699779. The next prime is 21699809. The reversal of 21699792 is 29799612.

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 7 ways as a sum of consecutive naturals, for example, 24684 + ... + 25547.

It is an arithmetic number, because the mean of its divisors is an integer number (1557192).

Almost surely, 2^21699792 is an apocalyptic number.

It is an amenable number.

21699792 is an abundant number, since it is smaller than the sum of its proper divisors (40587888).

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

21699792 is a wasteful number, since it uses less digits than its factorization.

21699792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50248 (or 50236 counting only the distinct ones).

The product of its digits is 122472, while the sum is 45.

The square root of 21699792 is about 4658.3035538702. The cubic root of 21699792 is about 278.9235540355.

The spelling of 21699792 in words is "twenty-one million, six hundred ninety-nine thousand, seven hundred ninety-two".