205422020 has 12 divisors (see below), whose sum is σ = 431386284. Its totient is φ = 82168800.

The previous prime is 205422001. The next prime is 205422029. The reversal of 205422020 is 20224502.

It can be written as a sum of positive squares in 2 ways, for example, as 62188996 + 143233024 = 7886^2 + 11968^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 205422020.

It is not an unprimeable number, because it can be changed into a prime (205422029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5135531 + ... + 5135570.

It is an arithmetic number, because the mean of its divisors is an integer number (35948857).

Almost surely, 2^205422020 is an apocalyptic number.

205422020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205422020 is an abundant number, since it is smaller than the sum of its proper divisors (225964264).

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

205422020 is a wasteful number, since it uses less digits than its factorization.

205422020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10271110 (or 10271108 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 205422020 is about 14332.5510639244. The cubic root of 205422020 is about 590.0411921829.

Adding to 205422020 its reverse (20224502), we get a palindrome (225646522).

The spelling of 205422020 in words is "two hundred five million, four hundred twenty-two thousand, twenty".