19749313159 has 4 divisors (see below), whose sum is σ = 19794924016. Its totient is φ = 19703702304.

The previous prime is 19749313081. The next prime is 19749313163. The reversal of 19749313159 is 95131394791.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 19749313159 - 2¹⁷ = 19749182087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19749311159) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22804779 + ... + 22805644.

It is an arithmetic number, because the mean of its divisors is an integer number (4948731004).

Almost surely, 2^19749313159 is an apocalyptic number.

19749313159 is a deficient number, since it is larger than the sum of its proper divisors (45610857).

19749313159 is an equidigital number, since it uses as much as digits as its factorization.

19749313159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45610856.

The product of its digits is 918540, while the sum is 52.

The spelling of 19749313159 in words is "nineteen billion, seven hundred forty-nine million, three hundred thirteen thousand, one hundred fifty-nine".