204021130 has 16 divisors (see below), whose sum is σ = 372270024. Its totient is φ = 80490240.

The previous prime is 204021121. The next prime is 204021151. The reversal of 204021130 is 31120402.

It can be written as a sum of positive squares in 4 ways, for example, as 190909489 + 13111641 = 13817^2 + 3621^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 204021130.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139011 + ... + 140470.

Almost surely, 2^204021130 is an apocalyptic number.

204021130 is a deficient number, since it is larger than the sum of its proper divisors (168248894).

204021130 is a wasteful number, since it uses less digits than its factorization.

204021130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279561.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 204021130 is about 14283.5965358869. The cubic root of 204021130 is about 588.6968557172.

Adding to 204021130 its reverse (31120402), we get a palindrome (235141532).

The spelling of 204021130 in words is "two hundred four million, twenty-one thousand, one hundred thirty".