205630042 has 16 divisors (see below), whose sum is σ = 317576160. Its totient is φ = 99801072.

The previous prime is 205630031. The next prime is 205630043. The reversal of 205630042 is 240036502.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 205629995 and 205630022.

It is not an unprimeable number, because it can be changed into a prime (205630043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6684 + ... + 21352.

It is an arithmetic number, because the mean of its divisors is an integer number (19848510).

Almost surely, 2^205630042 is an apocalyptic number.

205630042 is a deficient number, since it is larger than the sum of its proper divisors (111946118).

205630042 is a wasteful number, since it uses less digits than its factorization.

205630042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14877.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 205630042 is about 14339.8062051061. The cubic root of 205630042 is about 590.2402947272.

Adding to 205630042 its reverse (240036502), we get a palindrome (445666544).

The spelling of 205630042 in words is "two hundred five million, six hundred thirty thousand, forty-two".