18051100 has 18 divisors (see below), whose sum is σ = 39171104. Its totient is φ = 7220400.

The previous prime is 18051071. The next prime is 18051101. The reversal of 18051100 is 115081.

It is a super-2 number, since 2×18051100² = 651684422420000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18051101) 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, 90156 + ... + 90355.

Almost surely, 2^18051100 is an apocalyptic number.

18051100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18051100 is an abundant number, since it is smaller than the sum of its proper divisors (21120004).

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

18051100 is a wasteful number, since it uses less digits than its factorization.

18051100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180525 (or 180518 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 16.

The square root of 18051100 is about 4248.6586118444. The cubic root of 18051100 is about 262.3219048965.

Adding to 18051100 its reverse (115081), we get a palindrome (18166181).

The spelling of 18051100 in words is "eighteen million, fifty-one thousand, one hundred".