205822420 has 24 divisors (see below), whose sum is σ = 433546848. Its totient is φ = 82077600.

The previous prime is 205822403. The next prime is 205822427. The reversal of 205822420 is 24228502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205822427) 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, 8926 + ... + 22165.

It is an arithmetic number, because the mean of its divisors is an integer number (18064452).

Almost surely, 2^205822420 is an apocalyptic number.

205822420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205822420 is an abundant number, since it is smaller than the sum of its proper divisors (227724428).

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

205822420 is a wasteful number, since it uses less digits than its factorization.

205822420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31431 (or 31429 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 25.

The square root of 205822420 is about 14346.5124681924. The cubic root of 205822420 is about 590.4243045703.

The spelling of 205822420 in words is "two hundred five million, eight hundred twenty-two thousand, four hundred twenty".