21632275375 has 8 divisors (see below), whose sum is σ = 26997079824. Its totient is φ = 17305820200.

The previous prime is 21632275331. The next prime is 21632275387. The reversal of 21632275375 is 57357223612.

It is not a de Polignac number, because 21632275375 - 2⁹ = 21632274863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86528977 + ... + 86529226.

It is an arithmetic number, because the mean of its divisors is an integer number (3374634978).

Almost surely, 2^21632275375 is an apocalyptic number.

21632275375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21632275375 is a deficient number, since it is larger than the sum of its proper divisors (5364804449).

21632275375 is an equidigital number, since it uses as much as digits as its factorization.

21632275375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173058218 (or 173058208 counting only the distinct ones).

The product of its digits is 529200, while the sum is 43.

Adding to 21632275375 its reverse (57357223612), we get a palindrome (78989498987).

The spelling of 21632275375 in words is "twenty-one billion, six hundred thirty-two million, two hundred seventy-five thousand, three hundred seventy-five".