20808000001 has 8 divisors (see below), whose sum is σ = 20855957408. Its totient is φ = 20760084000.

The previous prime is 20807999987. The next prime is 20808000007. The reversal of 20808000001 is 10000080802.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20808000001 - 2⁹ = 20807999489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20808000007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1139221 + ... + 1157341.

It is an arithmetic number, because the mean of its divisors is an integer number (2606994676).

Almost surely, 2^20808000001 is an apocalyptic number.

It is an amenable number.

20808000001 is a deficient number, since it is larger than the sum of its proper divisors (47957407).

20808000001 is a wasteful number, since it uses less digits than its factorization.

20808000001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20703.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 20808000001 its reverse (10000080802), we get a palindrome (30808080803).

The spelling of 20808000001 in words is "twenty billion, eight hundred eight million, one", and thus it is an aban number.