20512585943 has 2 divisors, whose sum is σ = 20512585944. Its totient is φ = 20512585942.

The previous prime is 20512585939. The next prime is 20512585957. The reversal of 20512585943 is 34958521502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20512585943 - 2² = 20512585939 is a prime.

It is a super-2 number, since 2×20512585943² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20512585894 and 20512585903.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20512585913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10256292971 + 10256292972.

It is an arithmetic number, because the mean of its divisors is an integer number (10256292972).

Almost surely, 2^20512585943 is an apocalyptic number.

20512585943 is a deficient number, since it is larger than the sum of its proper divisors (1).

20512585943 is an equidigital number, since it uses as much as digits as its factorization.

20512585943 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432000, while the sum is 44.

The spelling of 20512585943 in words is "twenty billion, five hundred twelve million, five hundred eighty-five thousand, nine hundred forty-three".