204042340 has 12 divisors (see below), whose sum is σ = 428488956. Its totient is φ = 81616928.

The previous prime is 204042337. The next prime is 204042343. The reversal of 204042340 is 43240402.

It is an interprime number because it is at equal distance from previous prime (204042337) and next prime (204042343).

It can be written as a sum of positive squares in 2 ways, for example, as 84052224 + 119990116 = 9168^2 + 10954^2 .

It is not an unprimeable number, because it can be changed into a prime (204042343) 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 3 ways as a sum of consecutive naturals, for example, 5101039 + ... + 5101078.

It is an arithmetic number, because the mean of its divisors is an integer number (35707413).

Almost surely, 2^204042340 is an apocalyptic number.

204042340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204042340 is an abundant number, since it is smaller than the sum of its proper divisors (224446616).

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

204042340 is a wasteful number, since it uses less digits than its factorization.

204042340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10202126 (or 10202124 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 204042340 is about 14284.3389766555. The cubic root of 204042340 is about 588.7172552834.

Adding to 204042340 its reverse (43240402), we get a palindrome (247282742).

The spelling of 204042340 in words is "two hundred four million, forty-two thousand, three hundred forty".