21143618024 has 16 divisors (see below), whose sum is σ = 39887502720. Its totient is φ = 10506950640.

The previous prime is 21143617967. The next prime is 21143618039. The reversal of 21143618024 is 42081634112.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8105912 + ... + 8108519.

It is an arithmetic number, because the mean of its divisors is an integer number (2492968920).

Almost surely, 2^21143618024 is an apocalyptic number.

It is an amenable number.

21143618024 is a deficient number, since it is larger than the sum of its proper divisors (18743884696).

21143618024 is a wasteful number, since it uses less digits than its factorization.

21143618024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16214600 (or 16214596 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The spelling of 21143618024 in words is "twenty-one billion, one hundred forty-three million, six hundred eighteen thousand, twenty-four".