20989042183 has 2 divisors, whose sum is σ = 20989042184. Its totient is φ = 20989042182.

The previous prime is 20989042169. The next prime is 20989042213. The reversal of 20989042183 is 38124098902.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20989042183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20989042783) 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, 10494521091 + 10494521092.

It is an arithmetic number, because the mean of its divisors is an integer number (10494521092).

Almost surely, 2^20989042183 is an apocalyptic number.

20989042183 is a deficient number, since it is larger than the sum of its proper divisors (1).

20989042183 is an equidigital number, since it uses as much as digits as its factorization.

20989042183 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 248832, while the sum is 46.

The spelling of 20989042183 in words is "twenty billion, nine hundred eighty-nine million, forty-two thousand, one hundred eighty-three".