19901066752 has 80 divisors (see below), whose sum is σ = 46552457952. Its totient is φ = 8320942080.

The previous prime is 19901066747. The next prime is 19901066761. The reversal of 19901066752 is 25766010991.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79228 + ... + 214660.

Almost surely, 2^19901066752 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19901066752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23276228976).

19901066752 is an abundant number, since it is smaller than the sum of its proper divisors (26651391200).

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

19901066752 is an equidigital number, since it uses as much as digits as its factorization.

19901066752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135499 (or 135483 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 46.

The spelling of 19901066752 in words is "nineteen billion, nine hundred one million, sixty-six thousand, seven hundred fifty-two".