18242723711 has 4 divisors (see below), whose sum is σ = 18243459432. Its totient is φ = 18241987992.

The previous prime is 18242723699. The next prime is 18242723743. The reversal of 18242723711 is 11732724281.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18242723711 is a prime.

It is a super-2 number, since 2×18242723711² (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 (18242723111) 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, 329321 + ... + 380706.

It is an arithmetic number, because the mean of its divisors is an integer number (4560864858).

Almost surely, 2^18242723711 is an apocalyptic number.

18242723711 is a deficient number, since it is larger than the sum of its proper divisors (735721).

18242723711 is an equidigital number, since it uses as much as digits as its factorization.

18242723711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 735720.

The product of its digits is 37632, while the sum is 38.

The spelling of 18242723711 in words is "eighteen billion, two hundred forty-two million, seven hundred twenty-three thousand, seven hundred eleven".