204131690 has 16 divisors (see below), whose sum is σ = 419928192. Its totient is φ = 69987984.

The previous prime is 204131689. The next prime is 204131731. The reversal of 204131690 is 96131402.

204131690 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×204131690² = 83339493724512200, which contains 22 as substring.

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, 1458014 + ... + 1458153.

It is an arithmetic number, because the mean of its divisors is an integer number (26245512).

Almost surely, 2^204131690 is an apocalyptic number.

204131690 is an abundant number, since it is smaller than the sum of its proper divisors (215796502).

204131690 is a wasteful number, since it uses less digits than its factorization.

204131690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2916181.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 204131690 is about 14287.4661854368. The cubic root of 204131690 is about 588.8031757032.

The spelling of 204131690 in words is "two hundred four million, one hundred thirty-one thousand, six hundred ninety".