205696420201 has 4 divisors (see below), whose sum is σ = 216522547600. Its totient is φ = 194870292804.

The previous prime is 205696420133. The next prime is 205696420207. The reversal of 205696420201 is 102024696502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 205696420201 - 2⁹ = 205696419689 is a prime.

It is a super-2 number, since 2×205696420201² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205696420207) 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, 5413063671 + ... + 5413063708.

It is an arithmetic number, because the mean of its divisors is an integer number (54130636900).

Almost surely, 2^205696420201 is an apocalyptic number.

It is an amenable number.

205696420201 is a deficient number, since it is larger than the sum of its proper divisors (10826127399).

205696420201 is a wasteful number, since it uses less digits than its factorization.

205696420201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10826127398.

The product of its (nonzero) digits is 51840, while the sum is 37.

The spelling of 205696420201 in words is "two hundred five billion, six hundred ninety-six million, four hundred twenty thousand, two hundred one".