205014321523 has 4 divisors (see below), whose sum is σ = 223651987128. Its totient is φ = 186376655920.

The previous prime is 205014321521. The next prime is 205014321529. The reversal of 205014321523 is 325123410502.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 205014321523 - 2¹ = 205014321521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 205014321491 and 205014321500.

It is not an unprimeable number, because it can be changed into a prime (205014321521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9318832786 + ... + 9318832807.

It is an arithmetic number, because the mean of its divisors is an integer number (55912996782).

Almost surely, 2^205014321523 is an apocalyptic number.

205014321523 is a deficient number, since it is larger than the sum of its proper divisors (18637665605).

205014321523 is a wasteful number, since it uses less digits than its factorization.

205014321523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18637665604.

The product of its (nonzero) digits is 7200, while the sum is 28.

The spelling of 205014321523 in words is "two hundred five billion, fourteen million, three hundred twenty-one thousand, five hundred twenty-three".