12503436400 has 480 divisors, whose sum is σ = 39522470400. Its totient is φ = 3691008000.

The previous prime is 12503436377. The next prime is 12503436431. The reversal of 12503436400 is 463430521.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 69851511 + ... + 69851689.

It is an arithmetic number, because the mean of its divisors is an integer number (82338480).

Almost surely, 2^12503436400 is an apocalyptic number.

12503436400 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 12503436400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19761235200).

12503436400 is an abundant number, since it is smaller than the sum of its proper divisors (27019034000).

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

12503436400 is a wasteful number, since it uses less digits than its factorization.

12503436400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337 (or 326 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

Adding to 12503436400 its reverse (463430521), we get a palindrome (12966866921).

The spelling of 12503436400 in words is "twelve billion, five hundred three million, four hundred thirty-six thousand, four hundred".