204107138 has 4 divisors (see below), whose sum is σ = 306160710. Its totient is φ = 102053568.

The previous prime is 204107119. The next prime is 204107147. The reversal of 204107138 is 831701402.

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

It can be written as a sum of positive squares in only one way, i.e., 197486809 + 6620329 = 14053^2 + 2573^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51026783 + ... + 51026786.

Almost surely, 2^204107138 is an apocalyptic number.

204107138 is a deficient number, since it is larger than the sum of its proper divisors (102053572).

204107138 is a wasteful number, since it uses less digits than its factorization.

204107138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102053571.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 204107138 is about 14286.6069449677. The cubic root of 204107138 is about 588.7795685974.

The spelling of 204107138 in words is "two hundred four million, one hundred seven thousand, one hundred thirty-eight".