21794560 has 36 divisors (see below), whose sum is σ = 52207848. Its totient is φ = 8717312.

The previous prime is 21794557. The next prime is 21794609. The reversal of 21794560 is 6549712.

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, 7234 + ... + 9793.

It is an arithmetic number, because the mean of its divisors is an integer number (1450218).

Almost surely, 2^21794560 is an apocalyptic number.

21794560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21794560 is an abundant number, since it is smaller than the sum of its proper divisors (30413288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21794560 is an equidigital number, since it uses as much as digits as its factorization.

21794560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17048 (or 17034 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 21794560 is about 4668.4644156296. The cubic root of 21794560 is about 279.3290055524.

The spelling of 21794560 in words is "twenty-one million, seven hundred ninety-four thousand, five hundred sixty".