18045705511 has 4 divisors (see below), whose sum is σ = 18046287400. Its totient is φ = 18045123624.

The previous prime is 18045705473. The next prime is 18045705529. The reversal of 18045705511 is 11550754081.

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-18045705511 is a prime.

It is a super-2 number, since 2×18045705511² (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 (18045705551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 241641 + ... + 307378.

It is an arithmetic number, because the mean of its divisors is an integer number (4511571850).

Almost surely, 2^18045705511 is an apocalyptic number.

18045705511 is a deficient number, since it is larger than the sum of its proper divisors (581889).

18045705511 is an equidigital number, since it uses as much as digits as its factorization.

18045705511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581888.

The product of its (nonzero) digits is 28000, while the sum is 37.

The spelling of 18045705511 in words is "eighteen billion, forty-five million, seven hundred five thousand, five hundred eleven".