21068268824084 has 6 divisors (see below), whose sum is σ = 36869470442154. Its totient is φ = 10534134412040.

The previous prime is 21068268824027. The next prime is 21068268824111. The reversal of 21068268824084 is 48042886286012.

It can be written as a sum of positive squares in only one way, i.e., 21052698775684 + 15570048400 = 4588322^2 + 124780^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2633533603007 + ... + 2633533603014.

It is an arithmetic number, because the mean of its divisors is an integer number (6144911740359).

Almost surely, 2^{21068268824084} is an apocalyptic number.

It is an amenable number.

21068268824084 is a deficient number, since it is larger than the sum of its proper divisors (15801201618070).

21068268824084 is a wasteful number, since it uses less digits than its factorization.

21068268824084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5267067206025 (or 5267067206023 counting only the distinct ones).

The product of its (nonzero) digits is 18874368, while the sum is 59.

The spelling of 21068268824084 in words is "twenty-one trillion, sixty-eight billion, two hundred sixty-eight million, eight hundred twenty-four thousand, eighty-four".