205140920 has 16 divisors (see below), whose sum is σ = 461567160. Its totient is φ = 82056352.

The previous prime is 205140893. The next prime is 205140931. The reversal of 205140920 is 29041502.

205140920 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2564222 + ... + 2564301.

Almost surely, 2^205140920 is an apocalyptic number.

205140920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205140920 is an abundant number, since it is smaller than the sum of its proper divisors (256426240).

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

205140920 is a wasteful number, since it uses less digits than its factorization.

205140920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5128534 (or 5128530 counting only the distinct ones).

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

The square root of 205140920 is about 14322.7413577150. The cubic root of 205140920 is about 589.7719313845.

The spelling of 205140920 in words is "two hundred five million, one hundred forty thousand, nine hundred twenty".