204342140 has 24 divisors (see below), whose sum is σ = 433546512. Its totient is φ = 80893440.

The previous prime is 204342139. The next prime is 204342209. The reversal of 204342140 is 41243402.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50726 + ... + 54605.

It is an arithmetic number, because the mean of its divisors is an integer number (18064438).

Almost surely, 2^204342140 is an apocalyptic number.

204342140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204342140 is an abundant number, since it is smaller than the sum of its proper divisors (229204372).

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

204342140 is a wasteful number, since it uses less digits than its factorization.

204342140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105437 (or 105435 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 204342140 is about 14294.8291350404. The cubic root of 204342140 is about 589.0054488366.

Adding to 204342140 its reverse (41243402), we get a palindrome (245585542).

The spelling of 204342140 in words is "two hundred four million, three hundred forty-two thousand, one hundred forty".