18494816903 has 8 divisors (see below), whose sum is σ = 19577514000. Its totient is φ = 17441782848.

The previous prime is 18494816891. The next prime is 18494816917. The reversal of 18494816903 is 30961849481.

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 18494816903 - 2¹⁸ = 18494554759 is a prime.

It is a super-2 number, since 2×18494816903² (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 (18494816003) 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 7 ways as a sum of consecutive naturals, for example, 7414478 + ... + 7416971.

It is an arithmetic number, because the mean of its divisors is an integer number (2447189250).

Almost surely, 2^18494816903 is an apocalyptic number.

18494816903 is a deficient number, since it is larger than the sum of its proper divisors (1082697097).

18494816903 is a wasteful number, since it uses less digits than its factorization.

18494816903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14831521.

The product of its (nonzero) digits is 1492992, while the sum is 53.

The spelling of 18494816903 in words is "eighteen billion, four hundred ninety-four million, eight hundred sixteen thousand, nine hundred three".