20136660220 has 24 divisors (see below), whose sum is σ = 43429879584. Its totient is φ = 7836970176.

The previous prime is 20136660179. The next prime is 20136660221. The reversal of 20136660220 is 2206663102.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20136660221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13605112 + ... + 13606591.

It is an arithmetic number, because the mean of its divisors is an integer number (1809578316).

Almost surely, 2^20136660220 is an apocalyptic number.

20136660220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20136660220 is an abundant number, since it is smaller than the sum of its proper divisors (23293219364).

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

20136660220 is a wasteful number, since it uses less digits than its factorization.

20136660220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27211749 (or 27211747 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 28.

The spelling of 20136660220 in words is "twenty billion, one hundred thirty-six million, six hundred sixty thousand, two hundred twenty".