21080760255 has 12 divisors (see below), whose sum is σ = 36539984520. Its totient is φ = 11243072112.

The previous prime is 21080760247. The next prime is 21080760269. The reversal of 21080760255 is 55206708012.

It is a happy number.

It is not a de Polignac number, because 21080760255 - 2³ = 21080760247 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 234230625 + ... + 234230714.

It is an arithmetic number, because the mean of its divisors is an integer number (3044998710).

Almost surely, 2^21080760255 is an apocalyptic number.

21080760255 is a deficient number, since it is larger than the sum of its proper divisors (15459224265).

21080760255 is a wasteful number, since it uses less digits than its factorization.

21080760255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468461350 (or 468461347 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The spelling of 21080760255 in words is "twenty-one billion, eighty million, seven hundred sixty thousand, two hundred fifty-five".