21792982 has 16 divisors (see below), whose sum is σ = 33694272. Its totient is φ = 10566720.

The previous prime is 21792973. The next prime is 21792989. The reversal of 21792982 is 28929712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21792989) by changing a digit.

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, 7683 + ... + 10129.

It is an arithmetic number, because the mean of its divisors is an integer number (2105892).

Almost surely, 2^21792982 is an apocalyptic number.

21792982 is a deficient number, since it is larger than the sum of its proper divisors (11901290).

21792982 is a wasteful number, since it uses less digits than its factorization.

21792982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2583.

The product of its digits is 36288, while the sum is 40.

The square root of 21792982 is about 4668.2954062484. The cubic root of 21792982 is about 279.3222639342.

The spelling of 21792982 in words is "twenty-one million, seven hundred ninety-two thousand, nine hundred eighty-two".