21034315055 has 8 divisors (see below), whose sum is σ = 27182807232. Its totient is φ = 15533032608.

The previous prime is 21034315013. The next prime is 21034315103. The reversal of 21034315055 is 55051343012.

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 21034315055 - 2¹² = 21034310959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161802359 + ... + 161802488.

It is an arithmetic number, because the mean of its divisors is an integer number (3397850904).

Almost surely, 2^21034315055 is an apocalyptic number.

21034315055 is a deficient number, since it is larger than the sum of its proper divisors (6148492177).

21034315055 is a wasteful number, since it uses less digits than its factorization.

21034315055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323604865.

The product of its (nonzero) digits is 9000, while the sum is 29.

Adding to 21034315055 its reverse (55051343012), we get a palindrome (76085658067).

The spelling of 21034315055 in words is "twenty-one billion, thirty-four million, three hundred fifteen thousand, fifty-five".