21327292 has 12 divisors (see below), whose sum is σ = 42654640. Its totient is φ = 9140256.

The previous prime is 21327289. The next prime is 21327301. The reversal of 21327292 is 29272312.

21327292 is an admirable number.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 761689 = 21327292 / (2 + 1 + 3 + 2 + 7 + 2 + 9 + 2).

It is a self number, because there is not a number n which added to its sum of digits gives 21327292.

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, 380817 + ... + 380872.

Almost surely, 2^21327292 is an apocalyptic number.

It is an amenable number.

21327292 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21327292 is a wasteful number, since it uses less digits than its factorization.

21327292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 761700 (or 761698 counting only the distinct ones).

The product of its digits is 3024, while the sum is 28.

The square root of 21327292 is about 4618.1481136923. The cubic root of 21327292 is about 277.3183271024.

The spelling of 21327292 in words is "twenty-one million, three hundred twenty-seven thousand, two hundred ninety-two".