21896468 has 24 divisors (see below), whose sum is σ = 41964384. Its totient is φ = 9914400.

The previous prime is 21896453. The next prime is 21896477. The reversal of 21896468 is 86469812.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12698 + ... + 14318.

It is an arithmetic number, because the mean of its divisors is an integer number (1748516).

Almost surely, 2^21896468 is an apocalyptic number.

It is an amenable number.

21896468 is a deficient number, since it is larger than the sum of its proper divisors (20067916).

21896468 is a wasteful number, since it uses less digits than its factorization.

21896468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1943 (or 1941 counting only the distinct ones).

The product of its digits is 165888, while the sum is 44.

The square root of 21896468 is about 4679.3661963988. The cubic root of 21896468 is about 279.7636951855.

The spelling of 21896468 in words is "twenty-one million, eight hundred ninety-six thousand, four hundred sixty-eight".