18503134 has 16 divisors (see below), whose sum is σ = 30073680. Its totient is φ = 8537880.

The previous prime is 18503129. The next prime is 18503137. The reversal of 18503134 is 43130581.

It is a junction number, because it is equal to n+sod(n) for n = 18503099 and 18503108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18503137) 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, 2289 + ... + 6499.

It is an arithmetic number, because the mean of its divisors is an integer number (1879605).

Almost surely, 2^18503134 is an apocalyptic number.

18503134 is a deficient number, since it is larger than the sum of its proper divisors (11570546).

18503134 is an equidigital number, since it uses as much as digits as its factorization.

18503134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4252 (or 4226 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 18503134 is about 4301.5269381930. The cubic root of 18503134 is about 264.4935574943.

The spelling of 18503134 in words is "eighteen million, five hundred three thousand, one hundred thirty-four".