18115187903 has 8 divisors (see below), whose sum is σ = 18158427072. Its totient is φ = 18071988256.

The previous prime is 18115187843. The next prime is 18115187911. The reversal of 18115187903 is 30978151181.

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 18115187903 - 2²² = 18110993599 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 (18115187303) 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, 1036826 + ... + 1054152.

It is an arithmetic number, because the mean of its divisors is an integer number (2269803384).

Almost surely, 2^18115187903 is an apocalyptic number.

18115187903 is a deficient number, since it is larger than the sum of its proper divisors (43239169).

18115187903 is a wasteful number, since it uses less digits than its factorization.

18115187903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19761.

The product of its (nonzero) digits is 60480, while the sum is 44.

The spelling of 18115187903 in words is "eighteen billion, one hundred fifteen million, one hundred eighty-seven thousand, nine hundred three".