18132858 has 12 divisors (see below), whose sum is σ = 39287898. Its totient is φ = 6044280.

The previous prime is 18132857. The next prime is 18132871. The reversal of 18132858 is 85823181.

It can be written as a sum of positive squares in only one way, i.e., 16136289 + 1996569 = 4017^2 + 1413^2 .

It is not an unprimeable number, because it can be changed into a prime (18132857) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 503673 + ... + 503708.

Almost surely, 2^18132858 is an apocalyptic number.

18132858 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

18132858 is an abundant number, since it is smaller than the sum of its proper divisors (21155040).

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

18132858 is a wasteful number, since it uses less digits than its factorization.

18132858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1007389 (or 1007386 counting only the distinct ones).

The product of its digits is 15360, while the sum is 36.

The square root of 18132858 is about 4258.2693667733. The cubic root of 18132858 is about 262.7173492375.

The spelling of 18132858 in words is "eighteen million, one hundred thirty-two thousand, eight hundred fifty-eight".