20256205043 has 2 divisors, whose sum is σ = 20256205044. Its totient is φ = 20256205042.

The previous prime is 20256204967. The next prime is 20256205051. The reversal of 20256205043 is 34050265202.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20256205043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20256204997 and 20256205015.

It is not a weakly prime, because it can be changed into another prime (20256205243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10128102521 + 10128102522.

It is an arithmetic number, because the mean of its divisors is an integer number (10128102522).

Almost surely, 2^20256205043 is an apocalyptic number.

20256205043 is a deficient number, since it is larger than the sum of its proper divisors (1).

20256205043 is an equidigital number, since it uses as much as digits as its factorization.

20256205043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 29.

The spelling of 20256205043 in words is "twenty billion, two hundred fifty-six million, two hundred five thousand, forty-three".