206340433123 has 4 divisors (see below), whose sum is σ = 225098654328. Its totient is φ = 187582211920.

The previous prime is 206340433099. The next prime is 206340433157. The reversal of 206340433123 is 321334043602.

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 206340433123 - 2²⁵ = 206306878691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206340433193) 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, 9379110586 + ... + 9379110607.

It is an arithmetic number, because the mean of its divisors is an integer number (56274663582).

Almost surely, 2^206340433123 is an apocalyptic number.

206340433123 is a deficient number, since it is larger than the sum of its proper divisors (18758221205).

206340433123 is a wasteful number, since it uses less digits than its factorization.

206340433123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18758221204.

The product of its (nonzero) digits is 31104, while the sum is 31.

Adding to 206340433123 its reverse (321334043602), we get a palindrome (527674476725).

The spelling of 206340433123 in words is "two hundred six billion, three hundred forty million, four hundred thirty-three thousand, one hundred twenty-three".