21021438602924 has 6 divisors (see below), whose sum is σ = 36787517555124. Its totient is φ = 10510719301460.

The previous prime is 21021438602917. The next prime is 21021438602947. The reversal of 21021438602924 is 42920683412012.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2627679825362 + ... + 2627679825369.

It is an arithmetic number, because the mean of its divisors is an integer number (6131252925854).

Almost surely, 2^{21021438602924} is an apocalyptic number.

It is an amenable number.

21021438602924 is a deficient number, since it is larger than the sum of its proper divisors (15766078952200).

21021438602924 is a wasteful number, since it uses less digits than its factorization.

21021438602924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5255359650735 (or 5255359650733 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 44.

The spelling of 21021438602924 in words is "twenty-one trillion, twenty-one billion, four hundred thirty-eight million, six hundred two thousand, nine hundred twenty-four".