12145243700 has 72 divisors (see below), whose sum is σ = 27970209792. Its totient is φ = 4561722880.

The previous prime is 12145243699. The next prime is 12145243709. The reversal of 12145243700 is 734254121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12145243709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 745037 + ... + 761163.

It is an arithmetic number, because the mean of its divisors is an integer number (388475136).

Almost surely, 2^12145243700 is an apocalyptic number.

12145243700 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 12145243700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13985104896).

12145243700 is an abundant number, since it is smaller than the sum of its proper divisors (15824966092).

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

12145243700 is a wasteful number, since it uses less digits than its factorization.

12145243700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16601 (or 16594 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 29.

Adding to 12145243700 its reverse (734254121), we get a palindrome (12879497821).

The spelling of 12145243700 in words is "twelve billion, one hundred forty-five million, two hundred forty-three thousand, seven hundred".