13143305642 has 16 divisors (see below), whose sum is σ = 20881779912. Its totient is φ = 6182976000.

The previous prime is 13143305641. The next prime is 13143305699. The reversal of 13143305642 is 24650334131.

It can be written as a sum of positive squares in 4 ways, for example, as 9920359201 + 3222946441 = 99601^2 + 56771^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13143305599 and 13143305608.

It is not an unprimeable number, because it can be changed into a prime (13143305641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37628 + ... + 166440.

Almost surely, 2^13143305642 is an apocalyptic number.

13143305642 is a deficient number, since it is larger than the sum of its proper divisors (7738474270).

13143305642 is a wasteful number, since it uses less digits than its factorization.

13143305642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131833.

The product of its (nonzero) digits is 25920, while the sum is 32.

Adding to 13143305642 its reverse (24650334131), we get a palindrome (37793639773).

The spelling of 13143305642 in words is "thirteen billion, one hundred forty-three million, three hundred five thousand, six hundred forty-two".