12533020400 has 60 divisors (see below), whose sum is σ = 30347795712. Its totient is φ = 4973713920.

The previous prime is 12533020373. The next prime is 12533020417. The reversal of 12533020400 is 402033521.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72557 + ... + 174156.

Almost surely, 2^12533020400 is an apocalyptic number.

12533020400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12533020400 is an abundant number, since it is smaller than the sum of its proper divisors (17814775312).

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

12533020400 is a wasteful number, since it uses less digits than its factorization.

12533020400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246858 (or 246847 counting only the distinct ones).

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

Adding to 12533020400 its reverse (402033521), we get a palindrome (12935053921).

The spelling of 12533020400 in words is "twelve billion, five hundred thirty-three million, twenty thousand, four hundred".