19891325120 has 56 divisors (see below), whose sum is σ = 47380910064. Its totient is φ = 7954062336.

The previous prime is 19891325081. The next prime is 19891325123. The reversal of 19891325120 is 2152319891.

It is not an unprimeable number, because it can be changed into a prime (19891325123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1302167 + ... + 1317353.

Almost surely, 2^19891325120 is an apocalyptic number.

19891325120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19891325120 is an abundant number, since it is smaller than the sum of its proper divisors (27489584944).

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

19891325120 is a wasteful number, since it uses less digits than its factorization.

19891325120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19297 (or 19287 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 41.

The spelling of 19891325120 in words is "nineteen billion, eight hundred ninety-one million, three hundred twenty-five thousand, one hundred twenty".