206021450505 has 32 divisors (see below), whose sum is σ = 356792857344. Its totient is φ = 100911073536.

The previous prime is 206021450491. The next prime is 206021450513. The reversal of 206021450505 is 505054120602.

It is not a de Polignac number, because 206021450505 - 2⁹ = 206021449993 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2643109 + ... + 2719938.

It is an arithmetic number, because the mean of its divisors is an integer number (11149776792).

Almost surely, 2^206021450505 is an apocalyptic number.

It is an amenable number.

206021450505 is a deficient number, since it is larger than the sum of its proper divisors (150771406839).

206021450505 is a wasteful number, since it uses less digits than its factorization.

206021450505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5363265.

The product of its (nonzero) digits is 12000, while the sum is 30.

The spelling of 206021450505 in words is "two hundred six billion, twenty-one million, four hundred fifty thousand, five hundred five".