18198134 has 4 divisors (see below), whose sum is σ = 27297204. Its totient is φ = 9099066.

The previous prime is 18198091. The next prime is 18198139. The reversal of 18198134 is 43189181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43189181 = 7 ⋅6169883.

It is a junction number, because it is equal to n+sod(n) for n = 18198094 and 18198103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18198139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4549532 + ... + 4549535.

It is an arithmetic number, because the mean of its divisors is an integer number (6824301).

Almost surely, 2^18198134 is an apocalyptic number.

18198134 is a deficient number, since it is larger than the sum of its proper divisors (9099070).

18198134 is an equidigital number, since it uses as much as digits as its factorization.

18198134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9099069.

The product of its digits is 6912, while the sum is 35.

The square root of 18198134 is about 4265.9270973611. The cubic root of 18198134 is about 263.0322214711.

The spelling of 18198134 in words is "eighteen million, one hundred ninety-eight thousand, one hundred thirty-four".