2018000001636 has 72 divisors (see below), whose sum is σ = 5152745916864. Its totient is φ = 665853422400.

The previous prime is 2018000001631. The next prime is 2018000001673. The reversal of 2018000001636 is 6361000008102.

2018000001636 is a `hidden beast` number, since 20 + 1 + 8 + 0 + 0 + 0 + 0 + 0 + 1 + 636 = 666.

It is not an unprimeable number, because it can be changed into a prime (2018000001631) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16325881 + ... + 16449023.

It is an arithmetic number, because the mean of its divisors is an integer number (71565915512).

Almost surely, 2^{2018000001636} is an apocalyptic number.

It is an amenable number.

2018000001636 is an abundant number, since it is smaller than the sum of its proper divisors (3134745915228).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2018000001636 is a wasteful number, since it uses less digits than its factorization.

2018000001636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127761 (or 127756 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

Adding to 2018000001636 its reverse (6361000008102), we get a palindrome (8379000009738).

The spelling of 2018000001636 in words is "two trillion, eighteen billion, one thousand, six hundred thirty-six".