19117486890 has 32 divisors (see below), whose sum is σ = 50979965760. Its totient is φ = 5097996432.

The previous prime is 19117486889. The next prime is 19117486919. The reversal of 19117486890 is 9868471191.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35402484 + ... + 35403023.

It is an arithmetic number, because the mean of its divisors is an integer number (1593123930).

Almost surely, 2^19117486890 is an apocalyptic number.

19117486890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19117486890 is an abundant number, since it is smaller than the sum of its proper divisors (31862478870).

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

19117486890 is a wasteful number, since it uses less digits than its factorization.

19117486890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70805523 (or 70805517 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 54.

The spelling of 19117486890 in words is "nineteen billion, one hundred seventeen million, four hundred eighty-six thousand, eight hundred ninety".