21603266130752 has 28 divisors (see below), whose sum is σ = 42869275467780. Its totient is φ = 10801558926336.

The previous prime is 21603266130673. The next prime is 21603266130757. The reversal of 21603266130752 is 25703166230612.

It can be written as a sum of positive squares in 2 ways, for example, as 7108067881216 + 14495198249536 = 2666096^2 + 3807256^2 .

It is a super-2 number, since 2×21603266130752² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21603266130757) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8918348 + ... + 11078964.

Almost surely, 2^{21603266130752} is an apocalyptic number.

It is an amenable number.

21603266130752 is a deficient number, since it is larger than the sum of its proper divisors (21266009337028).

21603266130752 is a wasteful number, since it uses less digits than its factorization.

21603266130752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2316858 (or 2316848 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 44.

The spelling of 21603266130752 in words is "twenty-one trillion, six hundred three billion, two hundred sixty-six million, one hundred thirty thousand, seven hundred fifty-two".