21544893141 has 8 divisors (see below), whose sum is σ = 28735182240. Its totient is φ = 14358933072.

The previous prime is 21544893119. The next prime is 21544893157. The reversal of 21544893141 is 14139844512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-21544893141 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 21544893093 and 21544893102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21544893191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1070626 + ... + 1090563.

It is an arithmetic number, because the mean of its divisors is an integer number (3591897780).

Almost surely, 2^21544893141 is an apocalyptic number.

It is an amenable number.

21544893141 is a deficient number, since it is larger than the sum of its proper divisors (7190289099).

21544893141 is a wasteful number, since it uses less digits than its factorization.

21544893141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2164515.

The product of its digits is 138240, while the sum is 42.

The spelling of 21544893141 in words is "twenty-one billion, five hundred forty-four million, eight hundred ninety-three thousand, one hundred forty-one".