205403719427 has 8 divisors (see below), whose sum is σ = 217493199216. Its totient is φ = 193315007232.

The previous prime is 205403719379. The next prime is 205403719453. The reversal of 205403719427 is 724917304502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 205403719427 - 2⁶ = 205403719363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205403719127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 413663 + ... + 762839.

It is an arithmetic number, because the mean of its divisors is an integer number (27186649902).

Almost surely, 2^205403719427 is an apocalyptic number.

205403719427 is a deficient number, since it is larger than the sum of its proper divisors (12089479789).

205403719427 is a wasteful number, since it uses less digits than its factorization.

205403719427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383797.

The product of its (nonzero) digits is 423360, while the sum is 44.

The spelling of 205403719427 in words is "two hundred five billion, four hundred three million, seven hundred nineteen thousand, four hundred twenty-seven".