18018511779 has 16 divisors (see below), whose sum is σ = 24470933760. Its totient is φ = 11790060960.

The previous prime is 18018511757. The next prime is 18018511789. The reversal of 18018511779 is 97711581081.

It is not a de Polignac number, because 18018511779 - 2¹¹ = 18018509731 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18018511789) 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 15 ways as a sum of consecutive naturals, for example, 19959 + ... + 190880.

It is an arithmetic number, because the mean of its divisors is an integer number (1529433360).

Almost surely, 2^18018511779 is an apocalyptic number.

18018511779 is a deficient number, since it is larger than the sum of its proper divisors (6452421981).

18018511779 is a wasteful number, since it uses less digits than its factorization.

18018511779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211370.

The product of its (nonzero) digits is 141120, while the sum is 48.

The spelling of 18018511779 in words is "eighteen billion, eighteen million, five hundred eleven thousand, seven hundred seventy-nine".