2020161636 has 18 divisors (see below), whose sum is σ = 5106519782. Its totient is φ = 673387200.

The previous prime is 2020161623. The next prime is 2020161653. The reversal of 2020161636 is 6361610202.

2020161636 is a `hidden beast` number, since 2 + 0 + 20 + 1 + 6 + 1 + 636 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2006144100 + 14017536 = 44790^2 + 3744^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 28057765 + ... + 28057836.

Almost surely, 2^2020161636 is an apocalyptic number.

It is an amenable number.

2020161636 is an abundant number, since it is smaller than the sum of its proper divisors (3086358146).

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

2020161636 is a wasteful number, since it uses less digits than its factorization.

2020161636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56115611 (or 56115606 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 2020161636 is about 44946.2082494174. The cubic root of 2020161636 is about 1264.1405809899.

Adding to 2020161636 its reverse (6361610202), we get a palindrome (8381771838).

The spelling of 2020161636 in words is "two billion, twenty million, one hundred sixty-one thousand, six hundred thirty-six".