20019000101 has 2 divisors, whose sum is σ = 20019000102. Its totient is φ = 20019000100.

The previous prime is 20019000047. The next prime is 20019000103. The reversal of 20019000101 is 10100091002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12099780001 + 7919220100 = 109999^2 + 88990^2 .

It is a cyclic number.

It is not a de Polignac number, because 20019000101 - 2¹⁴ = 20018983717 is a prime.

It is a Sophie Germain prime.

Together with 20019000103, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20019000103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10009500050 + 10009500051.

It is an arithmetic number, because the mean of its divisors is an integer number (10009500051).

Almost surely, 2^20019000101 is an apocalyptic number.

It is an amenable number.

20019000101 is a deficient number, since it is larger than the sum of its proper divisors (1).

20019000101 is an equidigital number, since it uses as much as digits as its factorization.

20019000101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18, while the sum is 14.

Adding to 20019000101 its reverse (10100091002), we get a palindrome (30119091103).

The spelling of 20019000101 in words is "twenty billion, nineteen million, one hundred one", and thus it is an aban number.