19819170080 has 24 divisors (see below), whose sum is σ = 46822789692. Its totient is φ = 7927667968.

The previous prime is 19819170071. The next prime is 19819170089. The reversal of 19819170080 is 8007191891.

It is an interprime number because it is at equal distance from previous prime (19819170071) and next prime (19819170089).

It can be written as a sum of positive squares in 2 ways, for example, as 19458018064 + 361152016 = 139492^2 + 19004^2 .

It is not an unprimeable number, because it can be changed into a prime (19819170089) 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, 61934747 + ... + 61935066.

Almost surely, 2^19819170080 is an apocalyptic number.

19819170080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19819170080 is an abundant number, since it is smaller than the sum of its proper divisors (27003619612).

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

19819170080 is a wasteful number, since it uses less digits than its factorization.

19819170080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123869828 (or 123869820 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 44.

The spelling of 19819170080 in words is "nineteen billion, eight hundred nineteen million, one hundred seventy thousand, eighty".