206924002321 has 3 divisors (see below), whose sum is σ = 206924457211. Its totient is φ = 206923547432.

The previous prime is 206924002301. The next prime is 206924002349. The reversal of 206924002321 is 123200429602.

The square root of 206924002321 is 454889.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 189128442321 + 17795560000 = 434889^2 + 133400^2 .

It is a de Polignac number, because none of the positive numbers 2^k-206924002321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206924002301) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 227445 + ... + 682333.

Almost surely, 2^206924002321 is an apocalyptic number.

206924002321 is the 454889-th square number.

206924002321 is the 227445-th centered octagonal number.

It is an amenable number.

206924002321 is a deficient number, since it is larger than the sum of its proper divisors (454890).

206924002321 is an frugal number, since it uses more digits than its factorization.

206924002321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 909778 (or 454889 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The spelling of 206924002321 in words is "two hundred six billion, nine hundred twenty-four million, two thousand, three hundred twenty-one".