21373606704272 has 40 divisors (see below), whose sum is σ = 43116829039032. Its totient is φ = 10255229107200.

The previous prime is 21373606704227. The next prime is 21373606704277. The reversal of 21373606704272 is 27240760637312.

It can be written as a sum of positive squares in 4 ways, for example, as 228728801536 + 21144877902736 = 478256^2 + 4598356^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21373606704272.

It is not an unprimeable number, because it can be changed into a prime (21373606704277) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 267023243 + ... + 267103274.

Almost surely, 2^{21373606704272} is an apocalyptic number.

It is an amenable number.

21373606704272 is an abundant number, since it is smaller than the sum of its proper divisors (21743222334760).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21373606704272 is a wasteful number, since it uses less digits than its factorization.

21373606704272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534126627 (or 534126621 counting only the distinct ones).

The product of its (nonzero) digits is 3556224, while the sum is 50.

The spelling of 21373606704272 in words is "twenty-one trillion, three hundred seventy-three billion, six hundred six million, seven hundred four thousand, two hundred seventy-two".