21722758844140 has 48 divisors (see below), whose sum is σ = 48286991289600. Its totient is φ = 8185794662592.

The previous prime is 21722758844117. The next prime is 21722758844161. The reversal of 21722758844140 is 4144885722712.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 159611184 + ... + 159747223.

It is an arithmetic number, because the mean of its divisors is an integer number (1005978985200).

Almost surely, 2^{21722758844140} is an apocalyptic number.

21722758844140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21722758844140 is an abundant number, since it is smaller than the sum of its proper divisors (26564232445460).

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

21722758844140 is a wasteful number, since it uses less digits than its factorization.

21722758844140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319358614 (or 319358612 counting only the distinct ones).

The product of its (nonzero) digits is 8028160, while the sum is 55.

The spelling of 21722758844140 in words is "twenty-one trillion, seven hundred twenty-two billion, seven hundred fifty-eight million, eight hundred forty-four thousand, one hundred forty".