21141543443545 has 16 divisors (see below), whose sum is σ = 29004883326720. Its totient is φ = 14491675059264.

The previous prime is 21141543443491. The next prime is 21141543443567. The reversal of 21141543443545 is 54534434514112.

It is a cyclic number.

It is not a de Polignac number, because 21141543443545 - 2²⁹ = 21141006572633 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21141543443495 and 21141543443504.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112056525 + ... + 112245034.

It is an arithmetic number, because the mean of its divisors is an integer number (1812805207920).

Almost surely, 2^{21141543443545} is an apocalyptic number.

It is an amenable number.

21141543443545 is a deficient number, since it is larger than the sum of its proper divisors (7863339883175).

21141543443545 is a wasteful number, since it uses less digits than its factorization.

21141543443545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224304264.

The product of its digits is 2304000, while the sum is 46.

Adding to 21141543443545 its reverse (54534434514112), we get a palindrome (75675977957657).

The spelling of 21141543443545 in words is "twenty-one trillion, one hundred forty-one billion, five hundred forty-three million, four hundred forty-three thousand, five hundred forty-five".