19801502832 has 20 divisors (see below), whose sum is σ = 51153882440. Its totient is φ = 6600500928.

The previous prime is 19801502827. The next prime is 19801502857. The reversal of 19801502832 is 23820510891.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 206265607 + ... + 206265702.

It is an arithmetic number, because the mean of its divisors is an integer number (2557694122).

Almost surely, 2^19801502832 is an apocalyptic number.

19801502832 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19801502832 is an abundant number, since it is smaller than the sum of its proper divisors (31352379608).

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

19801502832 is a wasteful number, since it uses less digits than its factorization.

19801502832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412531320 (or 412531314 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 39.

The spelling of 19801502832 in words is "nineteen billion, eight hundred one million, five hundred two thousand, eight hundred thirty-two".