21603266363356 has 48 divisors (see below), whose sum is σ = 40539184076160. Its totient is φ = 10042648125120.

The previous prime is 21603266363353. The next prime is 21603266363369. The reversal of 21603266363356 is 65336366230612.

It is a super-2 number, since 2×21603266363356² (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 (21603266363353) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3205726 + ... + 7313221.

It is an arithmetic number, because the mean of its divisors is an integer number (844566334920).

Almost surely, 2^{21603266363356} is an apocalyptic number.

It is an amenable number.

21603266363356 is a deficient number, since it is larger than the sum of its proper divisors (18935917712804).

21603266363356 is a wasteful number, since it uses less digits than its factorization.

21603266363356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10519474 (or 10519472 counting only the distinct ones).

The product of its (nonzero) digits is 12597120, while the sum is 52.

The spelling of 21603266363356 in words is "twenty-one trillion, six hundred three billion, two hundred sixty-six million, three hundred sixty-three thousand, three hundred fifty-six".