20001220206 has 64 divisors (see below), whose sum is σ = 43867478016. Its totient is φ = 6029337600.

The previous prime is 20001220153. The next prime is 20001220207. The reversal of 20001220206 is 60202210002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001220207) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20182371 + ... + 20183361.

It is an arithmetic number, because the mean of its divisors is an integer number (685429344).

Almost surely, 2^20001220206 is an apocalyptic number.

20001220206 is an abundant number, since it is smaller than the sum of its proper divisors (23866257810).

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

20001220206 is a wasteful number, since it uses less digits than its factorization.

20001220206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2297.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 20001220206 its reverse (60202210002), we get a palindrome (80203430208).

The spelling of 20001220206 in words is "twenty billion, one million, two hundred twenty thousand, two hundred six".