12052420400 has 120 divisors (see below), whose sum is σ = 29472470784. Its totient is φ = 4735494400.

The previous prime is 12052420339. The next prime is 12052420447. The reversal of 12052420400 is 402425021.

It is a happy number.

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, 9854189 + ... + 9855411.

Almost surely, 2^12052420400 is an apocalyptic number.

12052420400 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 12052420400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14736235392).

12052420400 is an abundant number, since it is smaller than the sum of its proper divisors (17420050384).

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

12052420400 is a wasteful number, since it uses less digits than its factorization.

12052420400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1659 (or 1648 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

Adding to 12052420400 its reverse (402425021), we get a palindrome (12454845421).

The spelling of 12052420400 in words is "twelve billion, fifty-two million, four hundred twenty thousand, four hundred".