21294366 has 24 divisors (see below), whose sum is σ = 44527560. Its totient is φ = 6788496.

The previous prime is 21294359. The next prime is 21294373. The reversal of 21294366 is 66349212.

It is an interprime number because it is at equal distance from previous prime (21294359) and next prime (21294373).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 181 + ... + 6528.

It is an arithmetic number, because the mean of its divisors is an integer number (1855315).

Almost surely, 2^21294366 is an apocalyptic number.

21294366 is an abundant number, since it is smaller than the sum of its proper divisors (23233194).

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

21294366 is a wasteful number, since it uses less digits than its factorization.

21294366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6760 (or 6737 counting only the distinct ones).

The product of its digits is 15552, while the sum is 33.

The square root of 21294366 is about 4614.5818878854. The cubic root of 21294366 is about 277.1755415704.

The spelling of 21294366 in words is "twenty-one million, two hundred ninety-four thousand, three hundred sixty-six".