18241900 has 36 divisors (see below), whose sum is σ = 41672680. Its totient is φ = 6912000.

The previous prime is 18241879. The next prime is 18241939. The reversal of 18241900 is 914281.

It is a happy number.

It is a super-2 number, since 2×18241900² = 665533831220000, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2901 + ... + 6700.

Almost surely, 2^18241900 is an apocalyptic number.

18241900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18241900 is an abundant number, since it is smaller than the sum of its proper divisors (23430780).

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

18241900 is a wasteful number, since it uses less digits than its factorization.

18241900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9634 (or 9627 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 18241900 is about 4271.0537341504. The cubic root of 18241900 is about 263.2429143539.

The spelling of 18241900 in words is "eighteen million, two hundred forty-one thousand, nine hundred".