19401765132 has 12 divisors (see below), whose sum is σ = 45270785336. Its totient is φ = 6467255040.

The previous prime is 19401765079. The next prime is 19401765133. The reversal of 19401765132 is 23156710491.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (19401765133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 808406869 + ... + 808406892.

Almost surely, 2^19401765132 is an apocalyptic number.

19401765132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19401765132 is an abundant number, since it is smaller than the sum of its proper divisors (25869020204).

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

19401765132 is a wasteful number, since it uses less digits than its factorization.

19401765132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1616813768 (or 1616813766 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 39.

The spelling of 19401765132 in words is "nineteen billion, four hundred one million, seven hundred sixty-five thousand, one hundred thirty-two".