19972190328 has 64 divisors (see below), whose sum is σ = 52576992000. Its totient is φ = 6304776192.

The previous prime is 19972190321. The next prime is 19972190339. The reversal of 19972190328 is 82309127991.

It is a Cunningham number, because it is equal to 141323²-1.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19972190321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1689976 + ... + 1701752.

It is an arithmetic number, because the mean of its divisors is an integer number (821515500).

Almost surely, 2^19972190328 is an apocalyptic number.

It is an amenable number.

19972190328 is an abundant number, since it is smaller than the sum of its proper divisors (32604801672).

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

19972190328 is a wasteful number, since it uses less digits than its factorization.

19972190328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15524 (or 15520 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 51.

The spelling of 19972190328 in words is "nineteen billion, nine hundred seventy-two million, one hundred ninety thousand, three hundred twenty-eight".