18873748519 has 4 divisors (see below), whose sum is σ = 19068323344. Its totient is φ = 18679173696.

The previous prime is 18873748471. The next prime is 18873748529. The reversal of 18873748519 is 91584737881.

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 18873748519 - 2²¹ = 18871651367 is a prime.

It is a super-2 number, since 2×18873748519² (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 (18873748529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97287267 + ... + 97287460.

It is an arithmetic number, because the mean of its divisors is an integer number (4767080836).

Almost surely, 2^18873748519 is an apocalyptic number.

18873748519 is a deficient number, since it is larger than the sum of its proper divisors (194574825).

18873748519 is an equidigital number, since it uses as much as digits as its factorization.

18873748519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194574824.

The product of its digits is 13547520, while the sum is 61.

The spelling of 18873748519 in words is "eighteen billion, eight hundred seventy-three million, seven hundred forty-eight thousand, five hundred nineteen".