18727230519 has 12 divisors (see below), whose sum is σ = 27493894792. Its totient is φ = 12280150800.

The previous prime is 18727230497. The next prime is 18727230521. The reversal of 18727230519 is 91503272781.

18727230519 is a `hidden beast` number, since 1 + 87 + 27 + 2 + 30 + 519 = 666.

It is not a de Polignac number, because 18727230519 - 2¹² = 18727226423 is a prime.

It is a super-2 number, since 2×18727230519² (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 (18727230589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17055217 + ... + 17056314.

Almost surely, 2^18727230519 is an apocalyptic number.

18727230519 is a deficient number, since it is larger than the sum of its proper divisors (8766664273).

18727230519 is a wasteful number, since it uses less digits than its factorization.

18727230519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34111598 (or 34111595 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 45.

The spelling of 18727230519 in words is "eighteen billion, seven hundred twenty-seven million, two hundred thirty thousand, five hundred nineteen".