20018518685 has 16 divisors (see below), whose sum is σ = 26208826560. Its totient is φ = 14557386240.

The previous prime is 20018518679. The next prime is 20018518699. The reversal of 20018518685 is 58681581002.

It is not a de Polignac number, because 20018518685 - 2¹⁰ = 20018517661 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 923906 + ... + 945324.

It is an arithmetic number, because the mean of its divisors is an integer number (1638051660).

Almost surely, 2^20018518685 is an apocalyptic number.

It is an amenable number.

20018518685 is a deficient number, since it is larger than the sum of its proper divisors (6190307875).

20018518685 is a wasteful number, since it uses less digits than its factorization.

20018518685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38428.

The product of its (nonzero) digits is 153600, while the sum is 44.

The spelling of 20018518685 in words is "twenty billion, eighteen million, five hundred eighteen thousand, six hundred eighty-five".