18036546688 has 16 divisors (see below), whose sum is σ = 35932183110. Its totient is φ = 9018273280.

The previous prime is 18036546683. The next prime is 18036546713. The reversal of 18036546688 is 88664563081.

It can be written as a sum of positive squares in only one way, i.e., 9618117184 + 8418429504 = 98072^2 + 91752^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is not an unprimeable number, because it can be changed into a prime (18036546683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70455133 + ... + 70455388.

Almost surely, 2^18036546688 is an apocalyptic number.

It is an amenable number.

18036546688 is a deficient number, since it is larger than the sum of its proper divisors (17895636422).

18036546688 is an equidigital number, since it uses as much as digits as its factorization.

18036546688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140910535 (or 140910523 counting only the distinct ones).

The product of its (nonzero) digits is 6635520, while the sum is 55.

The spelling of 18036546688 in words is "eighteen billion, thirty-six million, five hundred forty-six thousand, six hundred eighty-eight".