18145312903 has 8 divisors (see below), whose sum is σ = 18569556368. Its totient is φ = 17721172224.

The previous prime is 18145312901. The next prime is 18145312921. The reversal of 18145312903 is 30921354181.

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 18145312903 - 2¹ = 18145312901 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 (18145312901) 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, 421201 + ... + 462277.

It is an arithmetic number, because the mean of its divisors is an integer number (2321194546).

Almost surely, 2^18145312903 is an apocalyptic number.

18145312903 is a deficient number, since it is larger than the sum of its proper divisors (424243465).

18145312903 is a wasteful number, since it uses less digits than its factorization.

18145312903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51393.

The product of its (nonzero) digits is 25920, while the sum is 37.

The spelling of 18145312903 in words is "eighteen billion, one hundred forty-five million, three hundred twelve thousand, nine hundred three".