21550540125300 has 144 divisors (see below), whose sum is σ = 66402338853312. Its totient is φ = 5377498265600.

The previous prime is 21550540125299. The next prime is 21550540125319. The reversal of 21550540125300 is 352104505512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11330406 + ... + 13095005.

It is an arithmetic number, because the mean of its divisors is an integer number (461127353148).

Almost surely, 2^{21550540125300} is an apocalyptic number.

21550540125300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21550540125300 is an abundant number, since it is smaller than the sum of its proper divisors (44851798728012).

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

21550540125300 is a wasteful number, since it uses less digits than its factorization.

21550540125300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24425618 (or 24425611 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 33.

The spelling of 21550540125300 in words is "twenty-one trillion, five hundred fifty billion, five hundred forty million, one hundred twenty-five thousand, three hundred".