18425000 has 96 divisors (see below), whose sum is σ = 47809440. Its totient is φ = 6600000.

The previous prime is 18424999. The next prime is 18425009. The reversal of 18425000 is 52481.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (18425009) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 274967 + ... + 275033.

It is an arithmetic number, because the mean of its divisors is an integer number (498015).

Almost surely, 2^18425000 is an apocalyptic number.

18425000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18425000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23904720).

18425000 is an abundant number, since it is smaller than the sum of its proper divisors (29384440).

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

18425000 is an equidigital number, since it uses as much as digits as its factorization.

18425000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109 (or 85 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 18425000 is about 4292.4352062670. The cubic root of 18425000 is about 264.1207360208.

Adding to 18425000 its reverse (52481), we get a palindrome (18477481).

The spelling of 18425000 in words is "eighteen million, four hundred twenty-five thousand".