21104540024 has 16 divisors (see below), whose sum is σ = 40113082320. Its totient is φ = 10407718080.

The previous prime is 21104539999. The next prime is 21104540059. The reversal of 21104540024 is 42004540112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18068372 + ... + 18069539.

It is an arithmetic number, because the mean of its divisors is an integer number (2507067645).

Almost surely, 2^21104540024 is an apocalyptic number.

It is an amenable number.

21104540024 is a deficient number, since it is larger than the sum of its proper divisors (19008542296).

21104540024 is a wasteful number, since it uses less digits than its factorization.

21104540024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36137990 (or 36137986 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

The spelling of 21104540024 in words is "twenty-one billion, one hundred four million, five hundred forty thousand, twenty-four".