21580228550183 has 4 divisors (see below), whose sum is σ = 21580585184928. Its totient is φ = 21579871915440.

The previous prime is 21580228550143. The next prime is 21580228550327. The reversal of 21580228550183 is 38105582208512.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21580228550183 - 2⁸ = 21580228549927 is a prime.

It is a super-2 number, since 2×21580228550183² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21580228550143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 178226591 + ... + 178347632.

It is an arithmetic number, because the mean of its divisors is an integer number (5395146296232).

Almost surely, 2^{21580228550183} is an apocalyptic number.

21580228550183 is a deficient number, since it is larger than the sum of its proper divisors (356634745).

21580228550183 is an equidigital number, since it uses as much as digits as its factorization.

21580228550183 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356634744.

The product of its (nonzero) digits is 1536000, while the sum is 50.

The spelling of 21580228550183 in words is "twenty-one trillion, five hundred eighty billion, two hundred twenty-eight million, five hundred fifty thousand, one hundred eighty-three".