206621896051 has 2 divisors, whose sum is σ = 206621896052. Its totient is φ = 206621896050.

The previous prime is 206621896007. The next prime is 206621896157. The reversal of 206621896051 is 150698126602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 206621896051 - 2³⁷ = 69182942579 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 206621895992 and 206621896010.

It is not a weakly prime, because it can be changed into another prime (206621896751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103310948025 + 103310948026.

It is an arithmetic number, because the mean of its divisors is an integer number (103310948026).

Almost surely, 2^206621896051 is an apocalyptic number.

206621896051 is a deficient number, since it is larger than the sum of its proper divisors (1).

206621896051 is an equidigital number, since it uses as much as digits as its factorization.

206621896051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 311040, while the sum is 46.

The spelling of 206621896051 in words is "two hundred six billion, six hundred twenty-one million, eight hundred ninety-six thousand, fifty-one".