21034445255 has 8 divisors (see below), whose sum is σ = 25243455600. Its totient is φ = 16826142016.

The previous prime is 21034445251. The next prime is 21034445261. The reversal of 21034445255 is 55254443012.

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 21034445255 - 2² = 21034445251 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21034445251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108965 + ... + 232254.

It is an arithmetic number, because the mean of its divisors is an integer number (3155431950).

Almost surely, 2^21034445255 is an apocalyptic number.

21034445255 is a deficient number, since it is larger than the sum of its proper divisors (4209010345).

21034445255 is a wasteful number, since it uses less digits than its factorization.

21034445255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353553.

The product of its (nonzero) digits is 96000, while the sum is 35.

Adding to 21034445255 its reverse (55254443012), we get a palindrome (76288888267).

The spelling of 21034445255 in words is "twenty-one billion, thirty-four million, four hundred forty-five thousand, two hundred fifty-five".