21744932914720 has 24 divisors (see below), whose sum is σ = 51372404011404. Its totient is φ = 8697973165824.

The previous prime is 21744932914717. The next prime is 21744932914787. The reversal of 21744932914720 is 2741923944712.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 21733460791056 + 11472123664 = 4661916^2 + 107108^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67952915199 + ... + 67952915518.

Almost surely, 2^{21744932914720} is an apocalyptic number.

21744932914720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21744932914720 is an abundant number, since it is smaller than the sum of its proper divisors (29627471096684).

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

21744932914720 is a wasteful number, since it uses less digits than its factorization.

21744932914720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135905830732 (or 135905830724 counting only the distinct ones).

The product of its (nonzero) digits is 6096384, while the sum is 55.

The spelling of 21744932914720 in words is "twenty-one trillion, seven hundred forty-four billion, nine hundred thirty-two million, nine hundred fourteen thousand, seven hundred twenty".