19498349513 has 16 divisors (see below), whose sum is σ = 19753730064. Its totient is φ = 19245158400.

The previous prime is 19498349501. The next prime is 19498349543. The reversal of 19498349513 is 31594389491.

It can be written as a sum of positive squares in 8 ways, for example, as 989291209 + 18509058304 = 31453^2 + 136048^2 .

It is a cyclic number.

It is not a de Polignac number, because 19498349513 - 2⁶ = 19498349449 is a prime.

It is a super-2 number, since 2×19498349513² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19498349543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19956881 + ... + 19957857.

It is an arithmetic number, because the mean of its divisors is an integer number (1234608129).

Almost surely, 2^19498349513 is an apocalyptic number.

It is an amenable number.

19498349513 is a deficient number, since it is larger than the sum of its proper divisors (255380551).

19498349513 is a wasteful number, since it uses less digits than its factorization.

19498349513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1852.

The product of its digits is 4199040, while the sum is 56.

The spelling of 19498349513 in words is "nineteen billion, four hundred ninety-eight million, three hundred forty-nine thousand, five hundred thirteen".