20135313544 has 16 divisors (see below), whose sum is σ = 38142927900. Its totient is φ = 9963866112.

The previous prime is 20135313511. The next prime is 20135313547. The reversal of 20135313544 is 44531353102.

It can be written as a sum of positive squares in 2 ways, for example, as 18834268644 + 1301044900 = 137238^2 + 36070^2 .

It is not an unprimeable number, because it can be changed into a prime (20135313547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12973009 + ... + 12974560.

Almost surely, 2^20135313544 is an apocalyptic number.

It is an amenable number.

20135313544 is a deficient number, since it is larger than the sum of its proper divisors (18007614356).

20135313544 is a wasteful number, since it uses less digits than its factorization.

20135313544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25947672 (or 25947668 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 31.

Adding to 20135313544 its reverse (44531353102), we get a palindrome (64666666646).

The spelling of 20135313544 in words is "twenty billion, one hundred thirty-five million, three hundred thirteen thousand, five hundred forty-four".