21552796 has 24 divisors (see below), whose sum is σ = 39127536. Its totient is φ = 10379520.

The previous prime is 21552779. The next prime is 21552799. The reversal of 21552796 is 69725512.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21552799) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 15156 + ... + 16516.

It is an arithmetic number, because the mean of its divisors is an integer number (1630314).

Almost surely, 2^21552796 is an apocalyptic number.

It is an amenable number.

21552796 is a deficient number, since it is larger than the sum of its proper divisors (17574740).

21552796 is a wasteful number, since it uses less digits than its factorization.

21552796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1509 (or 1507 counting only the distinct ones).

The product of its digits is 37800, while the sum is 37.

The square root of 21552796 is about 4642.4988960688. The cubic root of 21552796 is about 278.2923102396.

The spelling of 21552796 in words is "twenty-one million, five hundred fifty-two thousand, seven hundred ninety-six".