205112020 has 24 divisors (see below), whose sum is σ = 431272800. Its totient is φ = 81942432.

The previous prime is 205112003. The next prime is 205112023. The reversal of 205112020 is 20211502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205112023) by changing a digit.

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, 11211 + ... + 23149.

It is an arithmetic number, because the mean of its divisors is an integer number (17969700).

Almost surely, 2^205112020 is an apocalyptic number.

205112020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205112020 is an abundant number, since it is smaller than the sum of its proper divisors (226160780).

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

205112020 is a wasteful number, since it uses less digits than its factorization.

205112020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12807 (or 12805 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 205112020 is about 14321.7324371041. The cubic root of 205112020 is about 589.7442346362.

Adding to 205112020 its reverse (20211502), we get a palindrome (225323522).

It can be divided in two parts, 205 and 112020, that added together give a square (112225 = 335²).

The spelling of 205112020 in words is "two hundred five million, one hundred twelve thousand, twenty".