20243234189 has 2 divisors, whose sum is σ = 20243234190. Its totient is φ = 20243234188.

The previous prime is 20243234183. The next prime is 20243234233. The reversal of 20243234189 is 98143234202.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18842229289 + 1401004900 = 137267^2 + 37430^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20243234189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20243234183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10121617094 + 10121617095.

It is an arithmetic number, because the mean of its divisors is an integer number (10121617095).

Almost surely, 2^20243234189 is an apocalyptic number.

It is an amenable number.

20243234189 is a deficient number, since it is larger than the sum of its proper divisors (1).

20243234189 is an equidigital number, since it uses as much as digits as its factorization.

20243234189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82944, while the sum is 38.

The spelling of 20243234189 in words is "twenty billion, two hundred forty-three million, two hundred thirty-four thousand, one hundred eighty-nine".