206631201023 has 4 divisors (see below), whose sum is σ = 222525908808. Its totient is φ = 190736493240.

The previous prime is 206631201013. The next prime is 206631201043. The reversal of 206631201023 is 320102136602.

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 206631201023 - 2¹⁸ = 206630938879 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 206631200983 and 206631201001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206631201013) 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, 7947353873 + ... + 7947353898.

It is an arithmetic number, because the mean of its divisors is an integer number (55631477202).

Almost surely, 2^206631201023 is an apocalyptic number.

206631201023 is a deficient number, since it is larger than the sum of its proper divisors (15894707785).

206631201023 is a wasteful number, since it uses less digits than its factorization.

206631201023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15894707784.

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 206631201023 its reverse (320102136602), we get a palindrome (526733337625).

The spelling of 206631201023 in words is "two hundred six billion, six hundred thirty-one million, two hundred one thousand, twenty-three".