22020201018 has 12 divisors (see below), whose sum is σ = 47710435578. Its totient is φ = 7340067000.

The previous prime is 22020201017. The next prime is 22020201043. The reversal of 22020201018 is 81010202022.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 14155526529 + 7864674489 = 118977^2 + 88683^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1223344501 = 22020201018 / (2 + 2 + 0 + 2 + 0 + 2 + 0 + 1 + 0 + 1 + 8).

It is not an unprimeable number, because it can be changed into a prime (22020201011) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 611672233 + ... + 611672268.

Almost surely, 2^22020201018 is an apocalyptic number.

22020201018 is an abundant number, since it is smaller than the sum of its proper divisors (25690234560).

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

22020201018 is a wasteful number, since it uses less digits than its factorization.

22020201018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1223344509 (or 1223344506 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The spelling of 22020201018 in words is "twenty-two billion, twenty million, two hundred one thousand, eighteen".