18858745903 has 4 divisors (see below), whose sum is σ = 18859031928. Its totient is φ = 18858459880.

The previous prime is 18858745897. The next prime is 18858745931. The reversal of 18858745903 is 30954785881.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 30954785881 = 17137 ⋅1806313.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18858745903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18858745943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11625 + ... + 194557.

It is an arithmetic number, because the mean of its divisors is an integer number (4714757982).

Almost surely, 2^18858745903 is an apocalyptic number.

18858745903 is a deficient number, since it is larger than the sum of its proper divisors (286025).

18858745903 is a wasteful number, since it uses less digits than its factorization.

18858745903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286024.

The product of its (nonzero) digits is 9676800, while the sum is 58.

The spelling of 18858745903 in words is "eighteen billion, eight hundred fifty-eight million, seven hundred forty-five thousand, nine hundred three".