20235653189 has 2 divisors, whose sum is σ = 20235653190. Its totient is φ = 20235653188.

The previous prime is 20235653183. The next prime is 20235653203. The reversal of 20235653189 is 98135653202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14875949089 + 5359704100 = 121967^2 + 73210^2 .

It is a cyclic number.

It is not a de Polignac number, because 20235653189 - 2⁸ = 20235652933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20235653183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10117826594 + 10117826595.

It is an arithmetic number, because the mean of its divisors is an integer number (10117826595).

Almost surely, 2^20235653189 is an apocalyptic number.

It is an amenable number.

20235653189 is a deficient number, since it is larger than the sum of its proper divisors (1).

20235653189 is an equidigital number, since it uses as much as digits as its factorization.

20235653189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 388800, while the sum is 44.

The spelling of 20235653189 in words is "twenty billion, two hundred thirty-five million, six hundred fifty-three thousand, one hundred eighty-nine".