21104755135 has 16 divisors (see below), whose sum is σ = 25401166560. Its totient is φ = 16833576960.

The previous prime is 21104755123. The next prime is 21104755171. The reversal of 21104755135 is 53155740112.

It is not a de Polignac number, because 21104755135 - 2⁹ = 21104754623 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21104755135.

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 15 ways as a sum of consecutive naturals, for example, 2460364 + ... + 2468926.

It is an arithmetic number, because the mean of its divisors is an integer number (1587572910).

Almost surely, 2^21104755135 is an apocalyptic number.

21104755135 is a deficient number, since it is larger than the sum of its proper divisors (4296411425).

21104755135 is an equidigital number, since it uses as much as digits as its factorization.

21104755135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9978.

The product of its (nonzero) digits is 21000, while the sum is 34.

The spelling of 21104755135 in words is "twenty-one billion, one hundred four million, seven hundred fifty-five thousand, one hundred thirty-five".