21792274 has 8 divisors (see below), whose sum is σ = 37358208. Its totient is φ = 9339540.

The previous prime is 21792263. The next prime is 21792289. The reversal of 21792274 is 47229712.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 778282 + ... + 778309.

It is an arithmetic number, because the mean of its divisors is an integer number (4669776).

Almost surely, 2^21792274 is an apocalyptic number.

21792274 is a deficient number, since it is larger than the sum of its proper divisors (15565934).

21792274 is a wasteful number, since it uses less digits than its factorization.

21792274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1556600.

The product of its digits is 14112, while the sum is 34.

The square root of 21792274 is about 4668.2195749557. The cubic root of 21792274 is about 279.3192390719.

The spelling of 21792274 in words is "twenty-one million, seven hundred ninety-two thousand, two hundred seventy-four".