20000206650 has 24 divisors (see below), whose sum is σ = 49600512864. Its totient is φ = 5333388400.

The previous prime is 20000206637. The next prime is 20000206687. The reversal of 20000206650 is 5660200002.

It is a Curzon number.

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, 66667206 + ... + 66667505.

It is an arithmetic number, because the mean of its divisors is an integer number (2066688036).

Almost surely, 2^20000206650 is an apocalyptic number.

20000206650 is an abundant number, since it is smaller than the sum of its proper divisors (29600306214).

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

20000206650 is a wasteful number, since it uses less digits than its factorization.

20000206650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133334726 (or 133334721 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

Adding to 20000206650 its reverse (5660200002), we get a palindrome (25660406652).

The spelling of 20000206650 in words is "twenty billion, two hundred six thousand, six hundred fifty".