18490300 has 18 divisors (see below), whose sum is σ = 40124168. Its totient is φ = 7396080.

The previous prime is 18490279. The next prime is 18490309. The reversal of 18490300 is 309481.

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 (18490309) 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, 92352 + ... + 92551.

Almost surely, 2^18490300 is an apocalyptic number.

18490300 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18490300 is an abundant number, since it is smaller than the sum of its proper divisors (21633868).

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

18490300 is a wasteful number, since it uses less digits than its factorization.

18490300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184917 (or 184910 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 18490300 is about 4300.0348835794. The cubic root of 18490300 is about 264.4323913617.

Adding to 18490300 its reverse (309481), we get a palindrome (18799781).

The spelling of 18490300 in words is "eighteen million, four hundred ninety thousand, three hundred".