205904300080 has 40 divisors (see below), whose sum is σ = 478767986352. Its totient is φ = 82354754304.

The previous prime is 205904300057. The next prime is 205904300089. The reversal of 205904300080 is 80003409502.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (205904300089) 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, 901194 + ... + 1106326.

Almost surely, 2^205904300080 is an apocalyptic number.

205904300080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205904300080 is an abundant number, since it is smaller than the sum of its proper divisors (272863686272).

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

205904300080 is a wasteful number, since it uses less digits than its factorization.

205904300080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217693 (or 217687 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

Adding to 205904300080 its reverse (80003409502), we get a palindrome (285907709582).

The spelling of 205904300080 in words is "two hundred five billion, nine hundred four million, three hundred thousand, eighty".