18513814711 has 4 divisors (see below), whose sum is σ = 21158645392. Its totient is φ = 15868984032.

The previous prime is 18513814703. The next prime is 18513814721. The reversal of 18513814711 is 11741831581.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11741831581 = 3517 ⋅3338593.

It is a cyclic number.

It is not a de Polignac number, because 18513814711 - 2³ = 18513814703 is a prime.

It is a super-2 number, since 2×18513814711² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18513814721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1322415330 + ... + 1322415343.

It is an arithmetic number, because the mean of its divisors is an integer number (5289661348).

Almost surely, 2^18513814711 is an apocalyptic number.

18513814711 is a deficient number, since it is larger than the sum of its proper divisors (2644830681).

18513814711 is an equidigital number, since it uses as much as digits as its factorization.

18513814711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2644830680.

The product of its digits is 26880, while the sum is 40.

The spelling of 18513814711 in words is "eighteen billion, five hundred thirteen million, eight hundred fourteen thousand, seven hundred eleven".