21640333230315 has 16 divisors (see below), whose sum is σ = 38471703520800. Its totient is φ = 11541511056096.

The previous prime is 21640333230311. The next prime is 21640333230317. The reversal of 21640333230315 is 51303233304612.

21640333230315 is a `hidden beast` number, since 2 + 1 + 6 + 4 + 0 + 3 + 332 + 3 + 0 + 315 = 666.

It is not a de Polignac number, because 21640333230315 - 2² = 21640333230311 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21640333230315.

It is not an unprimeable number, because it can be changed into a prime (21640333230311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80149382200 + ... + 80149382469.

It is an arithmetic number, because the mean of its divisors is an integer number (2404481470050).

Almost surely, 2^{21640333230315} is an apocalyptic number.

21640333230315 is a deficient number, since it is larger than the sum of its proper divisors (16831370290485).

21640333230315 is a wasteful number, since it uses less digits than its factorization.

21640333230315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160298764683 (or 160298764677 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 36.

Adding to 21640333230315 its reverse (51303233304612), we get a palindrome (72943566534927).

The spelling of 21640333230315 in words is "twenty-one trillion, six hundred forty billion, three hundred thirty-three million, two hundred thirty thousand, three hundred fifteen".