19971074232 has 160 divisors (see below), whose sum is σ = 56853350400. Its totient is φ = 6548682816.

The previous prime is 19971074209. The next prime is 19971074267. The reversal of 19971074232 is 23247017991.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 18786933 + ... + 18787995.

It is an arithmetic number, because the mean of its divisors is an integer number (355333440).

Almost surely, 2^19971074232 is an apocalyptic number.

19971074232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19971074232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28426675200).

19971074232 is an abundant number, since it is smaller than the sum of its proper divisors (36882276168).

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

19971074232 is a wasteful number, since it uses less digits than its factorization.

19971074232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1527 (or 1514 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 45.

The spelling of 19971074232 in words is "nineteen billion, nine hundred seventy-one million, seventy-four thousand, two hundred thirty-two".