205012940 has 24 divisors (see below), whose sum is σ = 469666512. Its totient is φ = 74550080.

The previous prime is 205012921. The next prime is 205012991. The reversal of 205012940 is 49210502.

It is a zygodrome in base 2.

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, 465719 + ... + 466158.

It is an arithmetic number, because the mean of its divisors is an integer number (19569438).

Almost surely, 2^205012940 is an apocalyptic number.

205012940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205012940 is an abundant number, since it is smaller than the sum of its proper divisors (264653572).

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

205012940 is a wasteful number, since it uses less digits than its factorization.

205012940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 931897 (or 931895 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 205012940 is about 14318.2729405470. The cubic root of 205012940 is about 589.6492600789.

The spelling of 205012940 in words is "two hundred five million, twelve thousand, nine hundred forty".