205020801 has 24 divisors (see below), whose sum is σ = 312923520. Its totient is φ = 134093232.

The previous prime is 205020797. The next prime is 205020839. The reversal of 205020801 is 108020502.

It is not a de Polignac number, because 205020801 - 2² = 205020797 is a prime.

It is not an unprimeable number, because it can be changed into a prime (205020601) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4920 + ... + 20838.

It is an arithmetic number, because the mean of its divisors is an integer number (13038480).

Almost surely, 2^205020801 is an apocalyptic number.

It is an amenable number.

205020801 is a deficient number, since it is larger than the sum of its proper divisors (107902719).

205020801 is an equidigital number, since it uses as much as digits as its factorization.

205020801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15987 (or 15975 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 205020801 is about 14318.5474472797. The cubic root of 205020801 is about 589.6567964708.

The spelling of 205020801 in words is "two hundred five million, twenty thousand, eight hundred one".