20100112189 has 2 divisors, whose sum is σ = 20100112190. Its totient is φ = 20100112188.

The previous prime is 20100112181. The next prime is 20100112213. The reversal of 20100112189 is 98121100102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13785108100 + 6315004089 = 117410^2 + 79467^2 .

It is a cyclic number.

It is not a de Polignac number, because 20100112189 - 2³ = 20100112181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20100112181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10050056094 + 10050056095.

It is an arithmetic number, because the mean of its divisors is an integer number (10050056095).

Almost surely, 2^20100112189 is an apocalyptic number.

It is an amenable number.

20100112189 is a deficient number, since it is larger than the sum of its proper divisors (1).

20100112189 is an equidigital number, since it uses as much as digits as its factorization.

20100112189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 25.

The spelling of 20100112189 in words is "twenty billion, one hundred million, one hundred twelve thousand, one hundred eighty-nine".