21142336573748 has 24 divisors (see below), whose sum is σ = 40098963698472. Its totient is φ = 9695848616064.

The previous prime is 21142336573739. The next prime is 21142336573753. The reversal of 21142336573748 is 84737563324112.

It can be written as a sum of positive squares in 4 ways, for example, as 428569241104 + 20713767332644 = 654652^2 + 4551238^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21142336573693 and 21142336573702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1294843415 + ... + 1294859742.

It is an arithmetic number, because the mean of its divisors is an integer number (1670790154103).

Almost surely, 2^{21142336573748} is an apocalyptic number.

It is an amenable number.

21142336573748 is a deficient number, since it is larger than the sum of its proper divisors (18956627124724).

21142336573748 is a wasteful number, since it uses less digits than its factorization.

21142336573748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2589703331 (or 2589703329 counting only the distinct ones).

The product of its digits is 20321280, while the sum is 56.

The spelling of 21142336573748 in words is "twenty-one trillion, one hundred forty-two billion, three hundred thirty-six million, five hundred seventy-three thousand, seven hundred forty-eight".