21043541144 has 16 divisors (see below), whose sum is σ = 39458338920. Its totient is φ = 10521317440.

The previous prime is 21043541119. The next prime is 21043541159. The reversal of 21043541144 is 44114534012.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 220484 + ... + 301164.

Almost surely, 2^21043541144 is an apocalyptic number.

It is an amenable number.

21043541144 is a deficient number, since it is larger than the sum of its proper divisors (18414797776).

21043541144 is a wasteful number, since it uses less digits than its factorization.

21043541144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113290 (or 113286 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 29.

The spelling of 21043541144 in words is "twenty-one billion, forty-three million, five hundred forty-one thousand, one hundred forty-four".