20895108943 has 2 divisors, whose sum is σ = 20895108944. Its totient is φ = 20895108942.

The previous prime is 20895108929. The next prime is 20895108953. The reversal of 20895108943 is 34980159802.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20895108943 is a prime.

It is a super-3 number, since 3×20895108943³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20895108953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10447554471 + 10447554472.

It is an arithmetic number, because the mean of its divisors is an integer number (10447554472).

Almost surely, 2^20895108943 is an apocalyptic number.

20895108943 is a deficient number, since it is larger than the sum of its proper divisors (1).

20895108943 is an equidigital number, since it uses as much as digits as its factorization.

20895108943 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 622080, while the sum is 49.

The spelling of 20895108943 in words is "twenty billion, eight hundred ninety-five million, one hundred eight thousand, nine hundred forty-three".