21792044 has 6 divisors (see below), whose sum is σ = 38136084. Its totient is φ = 10896020.

The previous prime is 21792007. The next prime is 21792049. The reversal of 21792044 is 44029712.

It is a junction number, because it is equal to n+sod(n) for n = 21791998 and 21792016.

It is not an unprimeable number, because it can be changed into a prime (21792049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2724002 + ... + 2724009.

It is an arithmetic number, because the mean of its divisors is an integer number (6356014).

Almost surely, 2^21792044 is an apocalyptic number.

It is an amenable number.

21792044 is a deficient number, since it is larger than the sum of its proper divisors (16344040).

21792044 is a wasteful number, since it uses less digits than its factorization.

21792044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5448015 (or 5448013 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 21792044 is about 4668.1949402312. The cubic root of 21792044 is about 279.3182564048.

The spelling of 21792044 in words is "twenty-one million, seven hundred ninety-two thousand, forty-four".