12459421800 has 288 divisors, whose sum is σ = 48429638400. Its totient is φ = 2811594240.

The previous prime is 12459421787. The next prime is 12459421811. The reversal of 12459421800 is 812495421.

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

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 989142 + ... + 1001658.

Almost surely, 2^12459421800 is an apocalyptic number.

12459421800 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 12459421800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24214819200).

12459421800 is an abundant number, since it is smaller than the sum of its proper divisors (35970216600).

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

12459421800 is a wasteful number, since it uses less digits than its factorization.

12459421800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12625 (or 12613 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The spelling of 12459421800 in words is "twelve billion, four hundred fifty-nine million, four hundred twenty-one thousand, eight hundred".