19998595329 has 8 divisors (see below), whose sum is σ = 26670135072. Its totient is φ = 13329726240.

The previous prime is 19998595319. The next prime is 19998595367. The reversal of 19998595329 is 92359589991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 19998595329 - 2⁴ = 19998595313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19998595319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 650124 + ... + 680189.

It is an arithmetic number, because the mean of its divisors is an integer number (3333766884).

Almost surely, 2^19998595329 is an apocalyptic number.

It is an amenable number.

19998595329 is a deficient number, since it is larger than the sum of its proper divisors (6671539743).

19998595329 is a wasteful number, since it uses less digits than its factorization.

19998595329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1335327.

The product of its digits is 70858800, while the sum is 69.

The spelling of 19998595329 in words is "nineteen billion, nine hundred ninety-eight million, five hundred ninety-five thousand, three hundred twenty-nine".