21640333230320 has 120 divisors (see below), whose sum is σ = 58531906919088. Its totient is φ = 7419081600000.

The previous prime is 21640333230317. The next prime is 21640333230323. The reversal of 21640333230320 is 2303233304612.

It is an interprime number because it is at equal distance from previous prime (21640333230317) and next prime (21640333230323).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21640333230323) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66167195 + ... + 66493445.

Almost surely, 2^{21640333230320} is an apocalyptic number.

21640333230320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21640333230320 is an abundant number, since it is smaller than the sum of its proper divisors (36891573688768).

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

21640333230320 is a wasteful number, since it uses less digits than its factorization.

21640333230320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343199 (or 343186 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 32.

Adding to 21640333230320 its reverse (2303233304612), we get a palindrome (23943566534932).

The spelling of 21640333230320 in words is "twenty-one trillion, six hundred forty billion, three hundred thirty-three million, two hundred thirty thousand, three hundred twenty".