21603275257236 has 24 divisors (see below), whose sum is σ = 50629702371360. Its totient is φ = 7169368880352.

The previous prime is 21603275257231. The next prime is 21603275257303. The reversal of 21603275257236 is 63275257230612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21603275257231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3965356171 + ... + 3965361618.

It is an arithmetic number, because the mean of its divisors is an integer number (2109570932140).

Almost surely, 2^{21603275257236} is an apocalyptic number.

It is an amenable number.

21603275257236 is an abundant number, since it is smaller than the sum of its proper divisors (29026427114124).

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

21603275257236 is a wasteful number, since it uses less digits than its factorization.

21603275257236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7930718023 (or 7930718021 counting only the distinct ones).

The product of its (nonzero) digits is 6350400, while the sum is 51.

The spelling of 21603275257236 in words is "twenty-one trillion, six hundred three billion, two hundred seventy-five million, two hundred fifty-seven thousand, two hundred thirty-six".