18134428 has 12 divisors (see below), whose sum is σ = 34176520. Its totient is φ = 8369712.

The previous prime is 18134399. The next prime is 18134429. The reversal of 18134428 is 82443181.

It is a self number, because there is not a number n which added to its sum of digits gives 18134428.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18134429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 174318 + ... + 174421.

Almost surely, 2^18134428 is an apocalyptic number.

It is an amenable number.

18134428 is a deficient number, since it is larger than the sum of its proper divisors (16042092).

18134428 is a wasteful number, since it uses less digits than its factorization.

18134428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348756 (or 348754 counting only the distinct ones).

The product of its digits is 6144, while the sum is 31.

The square root of 18134428 is about 4258.4537099750. The cubic root of 18134428 is about 262.7249313174.

It can be divided in two parts, 1813 and 4428, that added together give a square (6241 = 79²).

The spelling of 18134428 in words is "eighteen million, one hundred thirty-four thousand, four hundred twenty-eight".