21332402 has 64 divisors (see below), whose sum is σ = 43008000. Its totient is φ = 7698240.

The previous prime is 21332401. The next prime is 21332417. The reversal of 21332402 is 20423312.

It is not an unprimeable number, because it can be changed into a prime (21332401) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 107099 + ... + 107297.

It is an arithmetic number, because the mean of its divisors is an integer number (672000).

Almost surely, 2^21332402 is an apocalyptic number.

21332402 is an abundant number, since it is smaller than the sum of its proper divisors (21675598).

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

21332402 is a wasteful number, since it uses less digits than its factorization.

21332402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 21332402 is about 4618.7013326259. The cubic root of 21332402 is about 277.3404737411.

Adding to 21332402 its reverse (20423312), we get a palindrome (41755714).

The spelling of 21332402 in words is "twenty-one million, three hundred thirty-two thousand, four hundred two".