18103494 has 8 divisors (see below), whose sum is σ = 36207000. Its totient is φ = 6034496.

The previous prime is 18103493. The next prime is 18103517. The reversal of 18103494 is 49430181.

It is a happy number.

18103494 is nontrivially palindromic in base 7.

It is a sphenic number, since it is the product of 3 distinct primes.

18103494 is an admirable number.

It is a super-3 number, since 3×18103494³ (a number of 23 digits) contains 333 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18103493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1508619 + ... + 1508630.

It is an arithmetic number, because the mean of its divisors is an integer number (4525875).

Almost surely, 2^18103494 is an apocalyptic number.

18103494 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18103494 is a wasteful number, since it uses less digits than its factorization.

18103494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3017254.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 18103494 is about 4254.8200902036. The cubic root of 18103494 is about 262.5754594851.

The spelling of 18103494 in words is "eighteen million, one hundred three thousand, four hundred ninety-four".