20017701001 has 2 divisors, whose sum is σ = 20017701002. Its totient is φ = 20017701000.

The previous prime is 20017700999. The next prime is 20017701017. The reversal of 20017701001 is 10010771002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17082228601 + 2935472400 = 130699^2 + 54180^2 .

It is a cyclic number.

It is not a de Polignac number, because 20017701001 - 2¹ = 20017700999 is a prime.

Together with 20017700999, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20017701001.

It is not a weakly prime, because it can be changed into another prime (20017701091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10008850500 + 10008850501.

It is an arithmetic number, because the mean of its divisors is an integer number (10008850501).

Almost surely, 2^20017701001 is an apocalyptic number.

It is an amenable number.

20017701001 is a deficient number, since it is larger than the sum of its proper divisors (1).

20017701001 is an equidigital number, since it uses as much as digits as its factorization.

20017701001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 98, while the sum is 19.

The spelling of 20017701001 in words is "twenty billion, seventeen million, seven hundred one thousand, one".