206405040134 has 4 divisors (see below), whose sum is σ = 309607560204. Its totient is φ = 103202520066.

The previous prime is 206405040103. The next prime is 206405040139. The reversal of 206405040134 is 431040504602.

206405040134 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 206405040097 and 206405040106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206405040139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51601260032 + ... + 51601260035.

It is an arithmetic number, because the mean of its divisors is an integer number (77401890051).

Almost surely, 2^206405040134 is an apocalyptic number.

206405040134 is a deficient number, since it is larger than the sum of its proper divisors (103202520070).

206405040134 is a wasteful number, since it uses less digits than its factorization.

206405040134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103202520069.

The product of its (nonzero) digits is 11520, while the sum is 29.

Adding to 206405040134 its reverse (431040504602), we get a palindrome (637445544736).

The spelling of 206405040134 in words is "two hundred six billion, four hundred five million, forty thousand, one hundred thirty-four".