21301557532755 has 16 divisors (see below), whose sum is σ = 34087671133344. Its totient is φ = 11359104323840.

The previous prime is 21301557532733. The next prime is 21301557532781. The reversal of 21301557532755 is 55723575510312.

It is not a de Polignac number, because 21301557532755 - 2⁶ = 21301557532691 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21301557532698 and 21301557532707.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107795514 + ... + 107992943.

It is an arithmetic number, because the mean of its divisors is an integer number (2130479445834).

Almost surely, 2^{21301557532755} is an apocalyptic number.

21301557532755 is a deficient number, since it is larger than the sum of its proper divisors (12786113600589).

21301557532755 is a wasteful number, since it uses less digits than its factorization.

21301557532755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215795046.

The product of its (nonzero) digits is 5512500, while the sum is 51.

The spelling of 21301557532755 in words is "twenty-one trillion, three hundred one billion, five hundred fifty-seven million, five hundred thirty-two thousand, seven hundred fifty-five".