20066943818 has 8 divisors (see below), whose sum is σ = 30376566660. Its totient is φ = 9941421600.

The previous prime is 20066943779. The next prime is 20066943829. The reversal of 20066943818 is 81834966002.

20066943818 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 19525311289 + 541632529 = 139733^2 + 23273^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46024883 + ... + 46025318.

Almost surely, 2^20066943818 is an apocalyptic number.

20066943818 is a deficient number, since it is larger than the sum of its proper divisors (10309622842).

20066943818 is a wasteful number, since it uses less digits than its factorization.

20066943818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92050312.

The product of its (nonzero) digits is 497664, while the sum is 47.

The spelling of 20066943818 in words is "twenty billion, sixty-six million, nine hundred forty-three thousand, eight hundred eighteen".