19117996554 has 16 divisors (see below), whose sum is σ = 38252354400. Its totient is φ = 6369938640.

The previous prime is 19117996537. The next prime is 19117996637. The reversal of 19117996554 is 45569971191.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 19117996494 and 19117996503.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 666504 + ... + 694595.

It is an arithmetic number, because the mean of its divisors is an integer number (2390772150).

Almost surely, 2^19117996554 is an apocalyptic number.

19117996554 is an abundant number, since it is smaller than the sum of its proper divisors (19134357846).

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

19117996554 is a wasteful number, since it uses less digits than its factorization.

19117996554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1363445.

The product of its digits is 3061800, while the sum is 57.

The spelling of 19117996554 in words is "nineteen billion, one hundred seventeen million, nine hundred ninety-six thousand, five hundred fifty-four".