18873415819 has 4 divisors (see below), whose sum is σ = 18873876096. Its totient is φ = 18872955544.

The previous prime is 18873415817. The next prime is 18873415837. The reversal of 18873415819 is 91851437881.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91851437881 = 7 ⋅13121633983.

It is a cyclic number.

It is not a de Polignac number, because 18873415819 - 2¹ = 18873415817 is a prime.

It is a super-2 number, since 2×18873415819² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18873415819.

It is not an unprimeable number, because it can be changed into a prime (18873415817) 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, 161884 + ... + 252889.

It is an arithmetic number, because the mean of its divisors is an integer number (4718469024).

Almost surely, 2^18873415819 is an apocalyptic number.

18873415819 is a deficient number, since it is larger than the sum of its proper divisors (460277).

18873415819 is an equidigital number, since it uses as much as digits as its factorization.

18873415819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460276.

The product of its digits is 1935360, while the sum is 55.

The spelling of 18873415819 in words is "eighteen billion, eight hundred seventy-three million, four hundred fifteen thousand, eight hundred nineteen".