21338896 has 20 divisors (see below), whose sum is σ = 42770700. Its totient is φ = 10301312.

The previous prime is 21338873. The next prime is 21338929. The reversal of 21338896 is 69883312.

It can be written as a sum of positive squares in 2 ways, for example, as 4000000 + 17338896 = 2000^2 + 4164^2 .

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, 22531 + ... + 23458.

It is an arithmetic number, because the mean of its divisors is an integer number (2138535).

Almost surely, 2^21338896 is an apocalyptic number.

It is an amenable number.

21338896 is an abundant number, since it is smaller than the sum of its proper divisors (21431804).

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

21338896 is a wasteful number, since it uses less digits than its factorization.

21338896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46026 (or 46020 counting only the distinct ones).

The product of its digits is 62208, while the sum is 40.

The square root of 21338896 is about 4619.4042905985. The cubic root of 21338896 is about 277.3686135057.

The spelling of 21338896 in words is "twenty-one million, three hundred thirty-eight thousand, eight hundred ninety-six".