21959299136752 has 80 divisors (see below), whose sum is σ = 44016184471392. Its totient is φ = 10605710499840.

The previous prime is 21959299136741. The next prime is 21959299136759. The reversal of 21959299136752 is 25763199295912.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21959299136759) 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, 124643158 + ... + 124819210.

Almost surely, 2^{21959299136752} is an apocalyptic number.

It is an amenable number.

21959299136752 is an abundant number, since it is smaller than the sum of its proper divisors (22056885334640).

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

21959299136752 is a wasteful number, since it uses less digits than its factorization.

21959299136752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177986 (or 177980 counting only the distinct ones).

The product of its digits is 165337200, while the sum is 70.

The spelling of 21959299136752 in words is "twenty-one trillion, nine hundred fifty-nine billion, two hundred ninety-nine million, one hundred thirty-six thousand, seven hundred fifty-two".