21204402314 has 32 divisors (see below), whose sum is σ = 32406965136. Its totient is φ = 10404495360.

The previous prime is 21204402269. The next prime is 21204402347. The reversal of 21204402314 is 41320440212.

It can be written as a sum of positive squares in 8 ways, for example, as 7569870025 + 13634532289 = 87005^2 + 116767^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21204402314.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10511834 + ... + 10513850.

Almost surely, 2^21204402314 is an apocalyptic number.

21204402314 is a deficient number, since it is larger than the sum of its proper divisors (11202562822).

21204402314 is a wasteful number, since it uses less digits than its factorization.

21204402314 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2570.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 21204402314 its reverse (41320440212), we get a palindrome (62524842526).

The spelling of 21204402314 in words is "twenty-one billion, two hundred four million, four hundred two thousand, three hundred fourteen".