11513421443 has 16 divisors (see below), whose sum is σ = 12168769536. Its totient is φ = 10871192640.

The previous prime is 11513421433. The next prime is 11513421449. The reversal of 11513421443 is 34412431511.

It is a cyclic number.

It is not a de Polignac number, because 11513421443 - 2⁴ = 11513421427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11513421449) 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, 4028471 + ... + 4031327.

It is an arithmetic number, because the mean of its divisors is an integer number (760548096).

Almost surely, 2^11513421443 is an apocalyptic number.

11513421443 is a deficient number, since it is larger than the sum of its proper divisors (655348093).

11513421443 is a wasteful number, since it uses less digits than its factorization.

11513421443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5074.

The product of its digits is 5760, while the sum is 29.

Adding to 11513421443 its reverse (34412431511), we get a palindrome (45925852954).

The spelling of 11513421443 in words is "eleven billion, five hundred thirteen million, four hundred twenty-one thousand, four hundred forty-three".