205023740 has 24 divisors (see below), whose sum is σ = 455877072. Its totient is φ = 77185280.

The previous prime is 205023719. The next prime is 205023743. The reversal of 205023740 is 47320502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205023743) 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, 301166 + ... + 301845.

It is an arithmetic number, because the mean of its divisors is an integer number (18994878).

Almost surely, 2^205023740 is an apocalyptic number.

205023740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205023740 is an abundant number, since it is smaller than the sum of its proper divisors (250853332).

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

205023740 is a wasteful number, since it uses less digits than its factorization.

205023740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 603037 (or 603035 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 23.

The square root of 205023740 is about 14318.6500760372. The cubic root of 205023740 is about 589.6596140598.

It can be divided in two parts, 20502 and 3740, that added together give a palindrome (24242).

The spelling of 205023740 in words is "two hundred five million, twenty-three thousand, seven hundred forty".