21495792 has 20 divisors (see below), whose sum is σ = 55530920. Its totient is φ = 7165248.

The previous prime is 21495787. The next prime is 21495797. The reversal of 21495792 is 29759412.

It is an interprime number because it is at equal distance from previous prime (21495787) and next prime (21495797).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 21495792.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21495797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 223867 + ... + 223962.

It is an arithmetic number, because the mean of its divisors is an integer number (2776546).

Almost surely, 2^21495792 is an apocalyptic number.

It is an amenable number.

21495792 is an abundant number, since it is smaller than the sum of its proper divisors (34035128).

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

21495792 is a wasteful number, since it uses less digits than its factorization.

21495792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447840 (or 447834 counting only the distinct ones).

The product of its digits is 45360, while the sum is 39.

The square root of 21495792 is about 4636.3554652334. The cubic root of 21495792 is about 278.0467461029.

The spelling of 21495792 in words is "twenty-one million, four hundred ninety-five thousand, seven hundred ninety-two".