21444505251032 has 16 divisors (see below), whose sum is σ = 40242151007640. Its totient is φ = 10713264982336.

The previous prime is 21444505250989. The next prime is 21444505251041. The reversal of 21444505251032 is 23015250544412.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1123445258 + ... + 1123464345.

Almost surely, 2^{21444505251032} is an apocalyptic number.

It is an amenable number.

21444505251032 is a deficient number, since it is larger than the sum of its proper divisors (18797645756608).

21444505251032 is a wasteful number, since it uses less digits than its factorization.

21444505251032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2246910802 (or 2246910798 counting only the distinct ones).

The product of its (nonzero) digits is 192000, while the sum is 38.

Adding to 21444505251032 its reverse (23015250544412), we get a palindrome (44459755795444).

The spelling of 21444505251032 in words is "twenty-one trillion, four hundred forty-four billion, five hundred five million, two hundred fifty-one thousand, thirty-two".