20083681818 has 48 divisors (see below), whose sum is σ = 45203925312. Its totient is φ = 6439272000.

The previous prime is 20083681789. The next prime is 20083681843. The reversal of 20083681818 is 81818638002.

20083681818 is a `hidden beast` number, since 200 + 8 + 368 + 1 + 81 + 8 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 139248 + ... + 244043.

It is an arithmetic number, because the mean of its divisors is an integer number (941748444).

Almost surely, 2^20083681818 is an apocalyptic number.

20083681818 is an abundant number, since it is smaller than the sum of its proper divisors (25120243494).

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

20083681818 is a wasteful number, since it uses less digits than its factorization.

20083681818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383411 (or 383408 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 45.

The spelling of 20083681818 in words is "twenty billion, eighty-three million, six hundred eighty-one thousand, eight hundred eighteen".