204857995 has 4 divisors (see below), whose sum is σ = 245829600. Its totient is φ = 163886392.

The previous prime is 204857969. The next prime is 204857999. The reversal of 204857995 is 599758402.

204857995 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 204857995 - 2⁹ = 204857483 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (204857999) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20485795 + ... + 20485804.

It is an arithmetic number, because the mean of its divisors is an integer number (61457400).

Almost surely, 2^204857995 is an apocalyptic number.

204857995 is a deficient number, since it is larger than the sum of its proper divisors (40971605).

204857995 is an equidigital number, since it uses as much as digits as its factorization.

204857995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40971604.

The product of its (nonzero) digits is 907200, while the sum is 49.

The square root of 204857995 is about 14312.8611744822. The cubic root of 204857995 is about 589.5006739602.

The spelling of 204857995 in words is "two hundred four million, eight hundred fifty-seven thousand, nine hundred ninety-five".