205011381023 has 2 divisors, whose sum is σ = 205011381024. Its totient is φ = 205011381022.

The previous prime is 205011380957. The next prime is 205011381109. The reversal of 205011381023 is 320183110502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 205011381023 - 2²⁸ = 204742945567 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 205011380983 and 205011381001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205011381923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102505690511 + 102505690512.

It is an arithmetic number, because the mean of its divisors is an integer number (102505690512).

Almost surely, 2^205011381023 is an apocalyptic number.

205011381023 is a deficient number, since it is larger than the sum of its proper divisors (1).

205011381023 is an equidigital number, since it uses as much as digits as its factorization.

205011381023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 26.

Adding to 205011381023 its reverse (320183110502), we get a palindrome (525194491525).

The spelling of 205011381023 in words is "two hundred five billion, eleven million, three hundred eighty-one thousand, twenty-three".