19170809880 has 32 divisors (see below), whose sum is σ = 57512430000. Its totient is φ = 5112215936.

The previous prime is 19170809873. The next prime is 19170809881. The reversal of 19170809880 is 8890807191.

It is a super-2 number, since 2×19170809880² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19170809881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79878255 + ... + 79878494.

Almost surely, 2^19170809880 is an apocalyptic number.

19170809880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19170809880 is an abundant number, since it is smaller than the sum of its proper divisors (38341620120).

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

19170809880 is a wasteful number, since it uses less digits than its factorization.

19170809880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159756763 (or 159756759 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 51.

The spelling of 19170809880 in words is "nineteen billion, one hundred seventy million, eight hundred nine thousand, eight hundred eighty".