2020818636 has 36 divisors (see below), whose sum is σ = 5115273072. Its totient is φ = 672670944.

The previous prime is 2020818601. The next prime is 2020818643. The reversal of 2020818636 is 6368180202.

2020818636 is a `hidden beast` number, since 2 + 0 + 2 + 0 + 8 + 18 + 636 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 2020818636.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12435 + ... + 64778.

Almost surely, 2^2020818636 is an apocalyptic number.

It is an amenable number.

2020818636 is an abundant number, since it is smaller than the sum of its proper divisors (3094454436).

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

2020818636 is a wasteful number, since it uses less digits than its factorization.

2020818636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77950 (or 77945 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 2020818636 is about 44953.5163919353. The cubic root of 2020818636 is about 1264.2776080355.

Adding to 2020818636 its reverse (6368180202), we get a palindrome (8388998838).

The spelling of 2020818636 in words is "two billion, twenty million, eight hundred eighteen thousand, six hundred thirty-six".