205525254020 has 24 divisors (see below), whose sum is σ = 431719243200. Its totient is φ = 82187966432.

The previous prime is 205525254019. The next prime is 205525254037. The reversal of 205525254020 is 20452525502.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1307210 + ... + 1455969.

It is an arithmetic number, because the mean of its divisors is an integer number (17988301800).

Almost surely, 2^205525254020 is an apocalyptic number.

205525254020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205525254020 is an abundant number, since it is smaller than the sum of its proper divisors (226193989180).

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

205525254020 is a wasteful number, since it uses less digits than its factorization.

205525254020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2766907 (or 2766905 counting only the distinct ones).

The product of its (nonzero) digits is 40000, while the sum is 32.

Adding to 205525254020 its reverse (20452525502), we get a palindrome (225977779522).

The spelling of 205525254020 in words is "two hundred five billion, five hundred twenty-five million, two hundred fifty-four thousand, twenty".