206138934998 has 16 divisors (see below), whose sum is σ = 312226144560. Its totient is φ = 102068332800.

The previous prime is 206138934997. The next prime is 206138935043. The reversal of 206138934998 is 899439831602.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 206138934998.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206138934997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1108343 + ... + 1280898.

It is an arithmetic number, because the mean of its divisors is an integer number (19514134035).

Almost surely, 2^206138934998 is an apocalyptic number.

206138934998 is a deficient number, since it is larger than the sum of its proper divisors (106087209562).

206138934998 is a wasteful number, since it uses less digits than its factorization.

206138934998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2389663.

The product of its (nonzero) digits is 20155392, while the sum is 62.

The spelling of 206138934998 in words is "two hundred six billion, one hundred thirty-eight million, nine hundred thirty-four thousand, nine hundred ninety-eight".