206193604051 has 4 divisors (see below), whose sum is σ = 206683375504. Its totient is φ = 205703832600.

The previous prime is 206193604039. The next prime is 206193604079. The reversal of 206193604051 is 150406391602.

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 206193604051 - 2³¹ = 204046120403 is a prime.

It is a super-2 number, since 2×206193604051² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 206193604051.

It is not an unprimeable number, because it can be changed into a prime (206193604151) 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, 244885095 + ... + 244885936.

It is an arithmetic number, because the mean of its divisors is an integer number (51670843876).

Almost surely, 2^206193604051 is an apocalyptic number.

206193604051 is a deficient number, since it is larger than the sum of its proper divisors (489771453).

206193604051 is an equidigital number, since it uses as much as digits as its factorization.

206193604051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489771452.

The product of its (nonzero) digits is 38880, while the sum is 37.

Adding to 206193604051 its reverse (150406391602), we get a palindrome (356599995653).

The spelling of 206193604051 in words is "two hundred six billion, one hundred ninety-three million, six hundred four thousand, fifty-one".