21563276252276 has 24 divisors (see below), whose sum is σ = 41573841351840. Its totient is φ = 9704444756000.

The previous prime is 21563276252239. The next prime is 21563276252311. The reversal of 21563276252276 is 67225267236512.

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, 2426106746 + ... + 2426115633.

It is an arithmetic number, because the mean of its divisors is an integer number (1732243389660).

Almost surely, 2^{21563276252276} is an apocalyptic number.

It is an amenable number.

21563276252276 is a deficient number, since it is larger than the sum of its proper divisors (20010565099564).

21563276252276 is a wasteful number, since it uses less digits than its factorization.

21563276252276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4852222495 (or 4852222493 counting only the distinct ones).

The product of its digits is 25401600, while the sum is 56.

The spelling of 21563276252276 in words is "twenty-one trillion, five hundred sixty-three billion, two hundred seventy-six million, two hundred fifty-two thousand, two hundred seventy-six".