20853092837 has 2 divisors, whose sum is σ = 20853092838. Its totient is φ = 20853092836.

The previous prime is 20853092791. The next prime is 20853092839. The reversal of 20853092837 is 73829035802.

It is a Cunningham number, because it is equal to 144406²+1.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20853092836 + 1 = 144406^2 + 1^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20853092837 is a prime.

Together with 20853092839, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 20853092791 and 20853092800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20853092839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10426546418 + 10426546419.

It is an arithmetic number, because the mean of its divisors is an integer number (10426546419).

Almost surely, 2^20853092837 is an apocalyptic number.

It is an amenable number.

20853092837 is a deficient number, since it is larger than the sum of its proper divisors (1).

20853092837 is an equidigital number, since it uses as much as digits as its factorization.

20853092837 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 725760, while the sum is 47.

The spelling of 20853092837 in words is "twenty billion, eight hundred fifty-three million, ninety-two thousand, eight hundred thirty-seven".