204086642 has 16 divisors (see below), whose sum is σ = 310366392. Its totient is φ = 100638720.

The previous prime is 204086633. The next prime is 204086651. The reversal of 204086642 is 246680402.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (204086633) and next prime (204086651).

It can be written as a sum of positive squares in 4 ways, for example, as 131308681 + 72777961 = 11459^2 + 8531^2 .

It is a junction number, because it is equal to n+sod(n) for n = 204086599 and 204086608.

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, 59042 + ... + 62402.

Almost surely, 2^204086642 is an apocalyptic number.

204086642 is a deficient number, since it is larger than the sum of its proper divisors (106279750).

204086642 is a wasteful number, since it uses less digits than its factorization.

204086642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3773.

The product of its (nonzero) digits is 18432, while the sum is 32.

The square root of 204086642 is about 14285.8896117813. The cubic root of 204086642 is about 588.7598599449.

The spelling of 204086642 in words is "two hundred four million, eighty-six thousand, six hundred forty-two".