21572792 has 16 divisors (see below), whose sum is σ = 40851000. Its totient is φ = 10679200.

The previous prime is 21572783. The next prime is 21572849. The reversal of 21572792 is 29727512.

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, 12542 + ... + 14157.

Almost surely, 2^21572792 is an apocalyptic number.

It is an amenable number.

21572792 is a deficient number, since it is larger than the sum of its proper divisors (19278208).

21572792 is a wasteful number, since it uses less digits than its factorization.

21572792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26806 (or 26802 counting only the distinct ones).

The product of its digits is 17640, while the sum is 35.

The square root of 21572792 is about 4644.6519783510. The cubic root of 21572792 is about 278.3783472282.

The spelling of 21572792 in words is "twenty-one million, five hundred seventy-two thousand, seven hundred ninety-two".