20181820002 has 16 divisors (see below), whose sum is σ = 40366123200. Its totient is φ = 6726859472.

The previous prime is 20181819991. The next prime is 20181820081. The reversal of 20181820002 is 20002818102.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12124 + ... + 201272.

It is an arithmetic number, because the mean of its divisors is an integer number (2522882700).

Almost surely, 2^20181820002 is an apocalyptic number.

20181820002 is an abundant number, since it is smaller than the sum of its proper divisors (20184303198).

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

20181820002 is a wasteful number, since it uses less digits than its factorization.

20181820002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206937.

The product of its (nonzero) digits is 512, while the sum is 24.

The spelling of 20181820002 in words is "twenty billion, one hundred eighty-one million, eight hundred twenty thousand, two".