20311540113 has 16 divisors (see below), whose sum is σ = 28525140800. Its totient is φ = 12820368960.

The previous prime is 20311540111. The next prime is 20311540153. The reversal of 20311540113 is 31104511302.

It is not a de Polignac number, because 20311540113 - 2¹ = 20311540111 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20311540113.

It is not an unprimeable number, because it can be changed into a prime (20311540111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17518 + ... + 202311.

It is an arithmetic number, because the mean of its divisors is an integer number (1782821300).

Almost surely, 2^20311540113 is an apocalyptic number.

It is an amenable number.

20311540113 is a deficient number, since it is larger than the sum of its proper divisors (8213600687).

20311540113 is a wasteful number, since it uses less digits than its factorization.

20311540113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221472.

The product of its (nonzero) digits is 360, while the sum is 21.

The spelling of 20311540113 in words is "twenty billion, three hundred eleven million, five hundred forty thousand, one hundred thirteen".