21300507255 has 16 divisors (see below), whose sum is σ = 36085565664. Its totient is φ = 10692019200.

The previous prime is 21300507203. The next prime is 21300507271. The reversal of 21300507255 is 55270500312.

It is not a de Polignac number, because 21300507255 - 2⁹ = 21300506743 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41765446 + ... + 41765955.

It is an arithmetic number, because the mean of its divisors is an integer number (2255347854).

Almost surely, 2^21300507255 is an apocalyptic number.

21300507255 is a deficient number, since it is larger than the sum of its proper divisors (14785058409).

21300507255 is a wasteful number, since it uses less digits than its factorization.

21300507255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83531426.

The product of its (nonzero) digits is 10500, while the sum is 30.

The spelling of 21300507255 in words is "twenty-one billion, three hundred million, five hundred seven thousand, two hundred fifty-five".