204145450 has 12 divisors (see below), whose sum is σ = 379710630. Its totient is φ = 81658160.

The previous prime is 204145433. The next prime is 204145451. The reversal of 204145450 is 54541402.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 103002201 + 101143249 = 10149^2 + 10057^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (204145451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2041405 + ... + 2041504.

Almost surely, 2^204145450 is an apocalyptic number.

204145450 is a deficient number, since it is larger than the sum of its proper divisors (175565180).

204145450 is a wasteful number, since it uses less digits than its factorization.

204145450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4082921 (or 4082916 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 204145450 is about 14287.9477182694. The cubic root of 204145450 is about 588.8164053160.

Adding to 204145450 its reverse (54541402), we get a palindrome (258686852).

The spelling of 204145450 in words is "two hundred four million, one hundred forty-five thousand, four hundred fifty".