203068138 has 16 divisors (see below), whose sum is σ = 374895360. Its totient is φ = 80334576.

The previous prime is 203068133. The next prime is 203068139. The reversal of 203068138 is 831860302.

It is not an unprimeable number, because it can be changed into a prime (203068133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 557698 + ... + 558061.

It is an arithmetic number, because the mean of its divisors is an integer number (23430960).

Almost surely, 2^203068138 is an apocalyptic number.

203068138 is a deficient number, since it is larger than the sum of its proper divisors (171827222).

203068138 is a wasteful number, since it uses less digits than its factorization.

203068138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1115781.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 203068138 is about 14250.1978231883. The cubic root of 203068138 is about 587.7788148755.

The spelling of 203068138 in words is "two hundred three million, sixty-eight thousand, one hundred thirty-eight".