204742530 has 24 divisors (see below), whose sum is σ = 532330812. Its totient is φ = 54597984.

The previous prime is 204742519. The next prime is 204742541. The reversal of 204742530 is 35247402.

204742530 is a `hidden beast` number, since 204 + 7 + 425 + 30 = 666.

It is an interprime number because it is at equal distance from previous prime (204742519) and next prime (204742541).

It can be written as a sum of positive squares in 2 ways, for example, as 204175521 + 567009 = 14289^2 + 753^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 204742494 and 204742503.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1137369 + ... + 1137548.

Almost surely, 2^204742530 is an apocalyptic number.

204742530 is an abundant number, since it is smaller than the sum of its proper divisors (327588282).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

204742530 is a wasteful number, since it uses less digits than its factorization.

204742530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2274930 (or 2274927 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 27.

The square root of 204742530 is about 14308.8269959490. The cubic root of 204742530 is about 589.3898988717.

Adding to 204742530 its reverse (35247402), we get a palindrome (239989932).

The spelling of 204742530 in words is "two hundred four million, seven hundred forty-two thousand, five hundred thirty".