18899147519 has 8 divisors (see below), whose sum is σ = 21668034720. Its totient is φ = 16147512576.

The previous prime is 18899147513. The next prime is 18899147539. The reversal of 18899147519 is 91574199881.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 18899147519 - 2⁸ = 18899147263 is a prime.

It is a super-2 number, since 2×18899147519² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18899147513) 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, 4310714 + ... + 4315095.

It is an arithmetic number, because the mean of its divisors is an integer number (2708504340).

Almost surely, 2^18899147519 is an apocalyptic number.

18899147519 is a deficient number, since it is larger than the sum of its proper divisors (2768887201).

18899147519 is an equidigital number, since it uses as much as digits as its factorization.

18899147519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8626129.

The product of its digits is 6531840, while the sum is 62.

The spelling of 18899147519 in words is "eighteen billion, eight hundred ninety-nine million, one hundred forty-seven thousand, five hundred nineteen".