21843227180553 has 16 divisors (see below), whose sum is σ = 29176529564160. Its totient is φ = 14536043368704.

The previous prime is 21843227180507. The next prime is 21843227180603. The reversal of 21843227180553 is 35508172234812.

It is a de Polignac number, because none of the positive numbers 2^k-21843227180553 is a prime.

It is a super-2 number, since 2×21843227180553² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21843227180496 and 21843227180505.

It is not an unprimeable number, because it can be changed into a prime (21843227188553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16141575 + ... + 17442387.

It is an arithmetic number, because the mean of its divisors is an integer number (1823533097760).

Almost surely, 2^{21843227180553} is an apocalyptic number.

It is an amenable number.

21843227180553 is a deficient number, since it is larger than the sum of its proper divisors (7333302383607).

21843227180553 is a wasteful number, since it uses less digits than its factorization.

21843227180553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1310848.

The product of its (nonzero) digits is 3225600, while the sum is 51.

The spelling of 21843227180553 in words is "twenty-one trillion, eight hundred forty-three billion, two hundred twenty-seven million, one hundred eighty thousand, five hundred fifty-three".