20001818384 has 20 divisors (see below), whose sum is σ = 41033142684. Its totient is φ = 9412620288.

The previous prime is 20001818327. The next prime is 20001818393. The reversal of 20001818384 is 48381810002.

It can be written as a sum of positive squares in 2 ways, for example, as 12991440400 + 7010377984 = 113980^2 + 83728^2 .

It is an unprimeable number.

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, 36767777 + ... + 36768320.

Almost surely, 2^20001818384 is an apocalyptic number.

It is an amenable number.

20001818384 is an abundant number, since it is smaller than the sum of its proper divisors (21031324300).

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

20001818384 is a wasteful number, since it uses less digits than its factorization.

20001818384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73536122 (or 73536116 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 35.

The spelling of 20001818384 in words is "twenty billion, one million, eight hundred eighteen thousand, three hundred eighty-four".