21336802 has 16 divisors (see below), whose sum is σ = 33973560. Its totient is φ = 10015488.

The previous prime is 21336787. The next prime is 21336803. The reversal of 21336802 is 20863312.

It can be written as a sum of positive squares in 4 ways, for example, as 20875761 + 461041 = 4569^2 + 679^2 .

It is not an unprimeable number, because it can be changed into a prime (21336803) by changing a digit.

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, 25324 + ... + 26152.

Almost surely, 2^21336802 is an apocalyptic number.

21336802 is a deficient number, since it is larger than the sum of its proper divisors (12636758).

21336802 is a wasteful number, since it uses less digits than its factorization.

21336802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1605.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 21336802 is about 4619.1776324363. The cubic root of 21336802 is about 277.3595404203.

The spelling of 21336802 in words is "twenty-one million, three hundred thirty-six thousand, eight hundred two".