204042190 has 32 divisors (see below), whose sum is σ = 401819616. Its totient is φ = 73983360.

The previous prime is 204042127. The next prime is 204042203. The reversal of 204042190 is 91240402.

It is a super-2 number, since 2×204042190² = 83266430599992200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38544 + ... + 43516.

It is an arithmetic number, because the mean of its divisors is an integer number (12556863).

Almost surely, 2^204042190 is an apocalyptic number.

204042190 is a deficient number, since it is larger than the sum of its proper divisors (197777426).

204042190 is a wasteful number, since it uses less digits than its factorization.

204042190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5364.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 204042190 is about 14284.3337261491. Note that the first 3 decimals coincide. The cubic root of 204042190 is about 588.7171110199.

Adding to 204042190 its reverse (91240402), we get a palindrome (295282592).

The spelling of 204042190 in words is "two hundred four million, forty-two thousand, one hundred ninety".