13020240311 has 4 divisors (see below), whose sum is σ = 14021797272. Its totient is φ = 12018683352.

The previous prime is 13020240253. The next prime is 13020240329. The reversal of 13020240311 is 11304202031.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-13020240311 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13020240311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13020240811) 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, 500778461 + ... + 500778486.

It is an arithmetic number, because the mean of its divisors is an integer number (3505449318).

Almost surely, 2^13020240311 is an apocalyptic number.

13020240311 is a deficient number, since it is larger than the sum of its proper divisors (1001556961).

13020240311 is a wasteful number, since it uses less digits than its factorization.

13020240311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1001556960.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 13020240311 its reverse (11304202031), we get a palindrome (24324442342).

The spelling of 13020240311 in words is "thirteen billion, twenty million, two hundred forty thousand, three hundred eleven".