18660818048 has 32 divisors (see below), whose sum is σ = 37266847500. Its totient is φ = 9307570176.

The previous prime is 18660818047. The next prime is 18660818053. The reversal of 18660818048 is 84081806681.

It can be written as a sum of positive squares in 2 ways, for example, as 17211340864 + 1449477184 = 131192^2 + 38072^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×18660818048² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18660817987 and 18660818005.

It is not an unprimeable number, because it can be changed into a prime (18660818041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125873 + ... + 230576.

Almost surely, 2^18660818048 is an apocalyptic number.

It is an amenable number.

18660818048 is a deficient number, since it is larger than the sum of its proper divisors (18606029452).

18660818048 is an equidigital number, since it uses as much as digits as its factorization.

18660818048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356872 (or 356860 counting only the distinct ones).

The product of its (nonzero) digits is 589824, while the sum is 50.

It can be divided in two parts, 18 and 660818048, that added together give a palindrome (660818066).

The spelling of 18660818048 in words is "eighteen billion, six hundred sixty million, eight hundred eighteen thousand, forty-eight".