18258100 has 36 divisors (see below), whose sum is σ = 45281824. Its totient is φ = 6259680.

The previous prime is 18258059. The next prime is 18258109. The reversal of 18258100 is 185281.

It is a super-2 number, since 2×18258100² = 666716431220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18258109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12342 + ... + 13741.

Almost surely, 2^18258100 is an apocalyptic number.

18258100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18258100 is an abundant number, since it is smaller than the sum of its proper divisors (27023724).

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

18258100 is a wasteful number, since it uses less digits than its factorization.

18258100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26104 (or 26097 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 25.

The square root of 18258100 is about 4272.9498007817. The cubic root of 18258100 is about 263.3208169379.

The spelling of 18258100 in words is "eighteen million, two hundred fifty-eight thousand, one hundred".