18345425400 has 576 divisors, whose sum is σ = 67684953600. Its totient is φ = 4562611200.

The previous prime is 18345425369. The next prime is 18345425401. The reversal of 18345425400 is 452454381.

It is a happy number.

18345425400 is a `hidden beast` number, since 183 + 4 + 54 + 25 + 400 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18345425401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 390328177 + ... + 390328223.

It is an arithmetic number, because the mean of its divisors is an integer number (117508600).

Almost surely, 2^18345425400 is an apocalyptic number.

18345425400 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 18345425400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33842476800).

18345425400 is an abundant number, since it is smaller than the sum of its proper divisors (49339528200).

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

18345425400 is a wasteful number, since it uses less digits than its factorization.

18345425400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197 (or 141 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 36.

Adding to 18345425400 its reverse (452454381), we get a palindrome (18797879781).

The spelling of 18345425400 in words is "eighteen billion, three hundred forty-five million, four hundred twenty-five thousand, four hundred".