20000000001 has 16 divisors (see below), whose sum is σ = 28087558400. Its totient is φ = 12623756688.

The previous prime is 19999999967. The next prime is 20000000089. The reversal of 20000000001 is 10000000002.

It is not a de Polignac number, because 20000000001 - 2¹⁷ = 19999868929 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (3).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20000000201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15091 + ... + 200568.

It is an arithmetic number, because the mean of its divisors is an integer number (1755472400).

Almost surely, 2^20000000001 is an apocalyptic number.

It is an amenable number.

20000000001 is a deficient number, since it is larger than the sum of its proper divisors (8087558399).

20000000001 is a wasteful number, since it uses less digits than its factorization.

20000000001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217308.

The product of its (nonzero) digits is 2, while the sum is 3.

Adding to 20000000001 its reverse (10000000002), we get a palindrome (30000000003).

Subtracting from 20000000001 its reverse (10000000002), we obtain a palindrome (9999999999).

The spelling of 20000000001 in words is "twenty billion, one", and thus it is an aban number and an uban number.