21174292 has 12 divisors (see below), whose sum is σ = 38332980. Its totient is φ = 10222016.

The previous prime is 21174289. The next prime is 21174301. The reversal of 21174292 is 29247112.

It can be written as a sum of positive squares in 2 ways, for example, as 12138256 + 9036036 = 3484^2 + 3006^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21174292.

It is a congruent number.

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, 91153 + ... + 91384.

It is an arithmetic number, because the mean of its divisors is an integer number (3194415).

Almost surely, 2^21174292 is an apocalyptic number.

It is an amenable number.

21174292 is a deficient number, since it is larger than the sum of its proper divisors (17158688).

21174292 is a wasteful number, since it uses less digits than its factorization.

21174292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182570 (or 182568 counting only the distinct ones).

The product of its digits is 2016, while the sum is 28.

The square root of 21174292 is about 4601.5532160348. The cubic root of 21174292 is about 276.6535830332.

The spelling of 21174292 in words is "twenty-one million, one hundred seventy-four thousand, two hundred ninety-two".