19498349518 has 16 divisors (see below), whose sum is σ = 30789601920. Its totient is φ = 9235240056.

The previous prime is 19498349501. The next prime is 19498349543. The reversal of 19498349518 is 81594389491.

It is a congruent number.

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, 759805 + ... + 785047.

It is an arithmetic number, because the mean of its divisors is an integer number (1924350120).

Almost surely, 2^19498349518 is an apocalyptic number.

19498349518 is a deficient number, since it is larger than the sum of its proper divisors (11291252402).

19498349518 is a wasteful number, since it uses less digits than its factorization.

19498349518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45591.

The product of its digits is 11197440, while the sum is 61.

The spelling of 19498349518 in words is "nineteen billion, four hundred ninety-eight million, three hundred forty-nine thousand, five hundred eighteen".