21794884 has 12 divisors (see below), whose sum is σ = 40384764. Its totient is φ = 10256384.

The previous prime is 21794879. The next prime is 21794933. The reversal of 21794884 is 48849712.

It can be written as a sum of positive squares in 2 ways, for example, as 11088900 + 10705984 = 3330^2 + 3272^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21794884.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160189 + ... + 160324.

It is an arithmetic number, because the mean of its divisors is an integer number (3365397).

Almost surely, 2^21794884 is an apocalyptic number.

It is an amenable number.

21794884 is a deficient number, since it is larger than the sum of its proper divisors (18589880).

21794884 is a wasteful number, since it uses less digits than its factorization.

21794884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320534 (or 320532 counting only the distinct ones).

The product of its digits is 129024, while the sum is 43.

The square root of 21794884 is about 4668.4991164185. The cubic root of 21794884 is about 279.3303897227.

The spelling of 21794884 in words is "twenty-one million, seven hundred ninety-four thousand, eight hundred eighty-four".