18820419066 has 16 divisors (see below), whose sum is σ = 41823153600. Its totient is φ = 6273473004.

The previous prime is 18820419061. The next prime is 18820419067. The reversal of 18820419066 is 66091402881.

It is not an unprimeable number, because it can be changed into a prime (18820419061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 174263086 + ... + 174263193.

It is an arithmetic number, because the mean of its divisors is an integer number (2613947100).

Almost surely, 2^18820419066 is an apocalyptic number.

18820419066 is an abundant number, since it is smaller than the sum of its proper divisors (23002734534).

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

18820419066 is a wasteful number, since it uses less digits than its factorization.

18820419066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348526290 (or 348526284 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The spelling of 18820419066 in words is "eighteen billion, eight hundred twenty million, four hundred nineteen thousand, sixty-six".