18118030 has 32 divisors (see below), whose sum is σ = 38071296. Its totient is φ = 6078624.

The previous prime is 18118027. The next prime is 18118031. The reversal of 18118030 is 3081181.

It is a super-2 number, since 2×18118030² = 656526022161800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18117992 and 18118010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18118031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 537 + ... + 6043.

It is an arithmetic number, because the mean of its divisors is an integer number (1189728).

Almost surely, 2^18118030 is an apocalyptic number.

18118030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18118030 is an abundant number, since it is smaller than the sum of its proper divisors (19953266).

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

18118030 is a wasteful number, since it uses less digits than its factorization.

18118030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5568.

The product of its (nonzero) digits is 192, while the sum is 22.

The square root of 18118030 is about 4256.5279277834. The cubic root of 18118030 is about 262.6457180364.

The spelling of 18118030 in words is "eighteen million, one hundred eighteen thousand, thirty".