203393138 has 16 divisors (see below), whose sum is σ = 345851520. Its totient is φ = 88932816.

The previous prime is 203393129. The next prime is 203393143. The reversal of 203393138 is 831393302.

It is an unprimeable number.

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, 205370 + ... + 206357.

It is an arithmetic number, because the mean of its divisors is an integer number (21615720).

Almost surely, 2^203393138 is an apocalyptic number.

203393138 is a deficient number, since it is larger than the sum of its proper divisors (142458382).

203393138 is a wasteful number, since it uses less digits than its factorization.

203393138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411761.

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 203393138 is about 14261.5966146852. The cubic root of 203393138 is about 588.0922175541.

The spelling of 203393138 in words is "two hundred three million, three hundred ninety-three thousand, one hundred thirty-eight".