21793268 has 24 divisors (see below), whose sum is σ = 45091200. Its totient is φ = 9017568.

The previous prime is 21793253. The next prime is 21793283. The reversal of 21793268 is 86239712.

It is an interprime number because it is at equal distance from previous prime (21793253) and next prime (21793283).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12608 + ... + 14231.

It is an arithmetic number, because the mean of its divisors is an integer number (1878800).

Almost surely, 2^21793268 is an apocalyptic number.

21793268 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

21793268 is an abundant number, since it is smaller than the sum of its proper divisors (23297932).

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

21793268 is a wasteful number, since it uses less digits than its factorization.

21793268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26879 (or 26877 counting only the distinct ones).

The product of its digits is 36288, while the sum is 38.

The square root of 21793268 is about 4668.3260383139. The cubic root of 21793268 is about 279.3234858232.

The spelling of 21793268 in words is "twenty-one million, seven hundred ninety-three thousand, two hundred sixty-eight".