204520378 has 4 divisors (see below), whose sum is σ = 306780570. Its totient is φ = 102260188.

The previous prime is 204520369. The next prime is 204520397. The reversal of 204520378 is 873025402.

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., 151856329 + 52664049 = 12323^2 + 7257^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51130093 + ... + 51130096.

Almost surely, 2^204520378 is an apocalyptic number.

204520378 is a deficient number, since it is larger than the sum of its proper divisors (102260192).

204520378 is a wasteful number, since it uses less digits than its factorization.

204520378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102260191.

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 204520378 is about 14301.0621283875. The cubic root of 204520378 is about 589.1766529489.

The spelling of 204520378 in words is "two hundred four million, five hundred twenty thousand, three hundred seventy-eight".