12540203242 has 16 divisors (see below), whose sum is σ = 21634421760. Its totient is φ = 5340140208.

The previous prime is 12540203237. The next prime is 12540203261. The reversal of 12540203242 is 24230204521.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2850442 + ... + 2854837.

It is an arithmetic number, because the mean of its divisors is an integer number (1352151360).

Almost surely, 2^12540203242 is an apocalyptic number.

12540203242 is a deficient number, since it is larger than the sum of its proper divisors (9094218518).

12540203242 is a wasteful number, since it uses less digits than its factorization.

12540203242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5705445.

The product of its (nonzero) digits is 3840, while the sum is 25.

Adding to 12540203242 its reverse (24230204521), we get a palindrome (36770407763).

The spelling of 12540203242 in words is "twelve billion, five hundred forty million, two hundred three thousand, two hundred forty-two".