20555240513200 has 60 divisors (see below), whose sum is σ = 49385249879560. Its totient is φ = 8221882337280.

The previous prime is 20555240513117. The next prime is 20555240513201. The reversal of 20555240513200 is 231504255502.

It is not an unprimeable number, because it can be changed into a prime (20555240513201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15199072 + ... + 16496128.

Almost surely, 2^{20555240513200} is an apocalyptic number.

20555240513200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20555240513200 is an abundant number, since it is smaller than the sum of its proper divisors (28830009366360).

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

20555240513200 is a wasteful number, since it uses less digits than its factorization.

20555240513200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1336694 (or 1336683 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 34.

Adding to 20555240513200 its reverse (231504255502), we get a palindrome (20786744768702).

The spelling of 20555240513200 in words is "twenty trillion, five hundred fifty-five billion, two hundred forty million, five hundred thirteen thousand, two hundred".