21014441255 has 8 divisors (see below), whose sum is σ = 25325559792. Its totient is φ = 16739399488.

The previous prime is 21014441179. The next prime is 21014441263. The reversal of 21014441255 is 55214441012.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21014441255 - 2²⁸ = 20746005799 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 (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9017909 + ... + 9020238.

It is an arithmetic number, because the mean of its divisors is an integer number (3165694974).

Almost surely, 2^21014441255 is an apocalyptic number.

21014441255 is a deficient number, since it is larger than the sum of its proper divisors (4311118537).

21014441255 is a wasteful number, since it uses less digits than its factorization.

21014441255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18038385.

The product of its (nonzero) digits is 6400, while the sum is 29.

Adding to 21014441255 its reverse (55214441012), we get a palindrome (76228882267).

The spelling of 21014441255 in words is "twenty-one billion, fourteen million, four hundred forty-one thousand, two hundred fifty-five".