18042300 has 54 divisors (see below), whose sum is σ = 56555408. Its totient is φ = 4811040.

The previous prime is 18042293. The next prime is 18042319. The reversal of 18042300 is 324081.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 9124 + ... + 10923.

Almost surely, 2^18042300 is an apocalyptic number.

18042300 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18042300 is an abundant number, since it is smaller than the sum of its proper divisors (38513108).

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

18042300 is a wasteful number, since it uses less digits than its factorization.

18042300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20067 (or 20057 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 18042300 is about 4247.6228646150. The cubic root of 18042300 is about 262.2792702281.

Adding to 18042300 its reverse (324081), we get a palindrome (18366381).

The spelling of 18042300 in words is "eighteen million, forty-two thousand, three hundred".