21827305551625 has 32 divisors (see below), whose sum is σ = 31596630504192. Its totient is φ = 14743902729600.

The previous prime is 21827305551587. The next prime is 21827305551637. The reversal of 21827305551625 is 52615550372812.

It is not a de Polignac number, because 21827305551625 - 2²⁷ = 21827171333897 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 186101764 + ... + 186219013.

It is an arithmetic number, because the mean of its divisors is an integer number (987394703256).

Almost surely, 2^{21827305551625} is an apocalyptic number.

21827305551625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21827305551625 is a deficient number, since it is larger than the sum of its proper divisors (9769324952567).

21827305551625 is an equidigital number, since it uses as much as digits as its factorization.

21827305551625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372320866 (or 372320856 counting only the distinct ones).

The product of its (nonzero) digits is 5040000, while the sum is 52.

The spelling of 21827305551625 in words is "twenty-one trillion, eight hundred twenty-seven billion, three hundred five million, five hundred fifty-one thousand, six hundred twenty-five".