12533002400 has 144 divisors (see below), whose sum is σ = 31987952640. Its totient is φ = 4789324800.

The previous prime is 12533002399. The next prime is 12533002453. The reversal of 12533002400 is 420033521.

It is a happy number.

It is a super-2 number, since 2×12533002400² (a number of 21 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1956002 + ... + 1962398.

It is an arithmetic number, because the mean of its divisors is an integer number (222138560).

Almost surely, 2^12533002400 is an apocalyptic number.

12533002400 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 12533002400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15993976320).

12533002400 is an abundant number, since it is smaller than the sum of its proper divisors (19454950240).

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

12533002400 is a wasteful number, since it uses less digits than its factorization.

12533002400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6527 (or 6514 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

Adding to 12533002400 its reverse (420033521), we get a palindrome (12953035921).

The spelling of 12533002400 in words is "twelve billion, five hundred thirty-three million, two thousand, four hundred".