21759198695952 has 80 divisors (see below), whose sum is σ = 56449315584000. Its totient is φ = 7222352889472.

The previous prime is 21759198695921. The next prime is 21759198695953. The reversal of 21759198695952 is 25959689195712.

It is not an unprimeable number, because it can be changed into a prime (21759198695953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 318646549 + ... + 318714827.

It is an arithmetic number, because the mean of its divisors is an integer number (705616444800).

Almost surely, 2^{21759198695952} is an apocalyptic number.

It is an amenable number.

21759198695952 is an abundant number, since it is smaller than the sum of its proper divisors (34690116888048).

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

21759198695952 is a wasteful number, since it uses less digits than its factorization.

21759198695952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96308 (or 96302 counting only the distinct ones).

The product of its digits is 1102248000, while the sum is 78.

The spelling of 21759198695952 in words is "twenty-one trillion, seven hundred fifty-nine billion, one hundred ninety-eight million, six hundred ninety-five thousand, nine hundred fifty-two".