20101000189 has 2 divisors, whose sum is σ = 20101000190. Its totient is φ = 20101000188.

The previous prime is 20101000159. The next prime is 20101000207. The reversal of 20101000189 is 98100010102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18430234564 + 1670765625 = 135758^2 + 40875^2 .

It is a cyclic number.

It is not a de Polignac number, because 20101000189 - 2⁷ = 20101000061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20101000159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10050500094 + 10050500095.

It is an arithmetic number, because the mean of its divisors is an integer number (10050500095).

Almost surely, 2^20101000189 is an apocalyptic number.

It is an amenable number.

20101000189 is a deficient number, since it is larger than the sum of its proper divisors (1).

20101000189 is an equidigital number, since it uses as much as digits as its factorization.

20101000189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 22.

The spelling of 20101000189 in words is "twenty billion, one hundred one million, one hundred eighty-nine", and thus it is an aban number.