21357065576575 has 12 divisors (see below), whose sum is σ = 26491681164960. Its totient is φ = 17079897719360.

The previous prime is 21357065576557. The next prime is 21357065576621. The reversal of 21357065576575 is 57567556075312.

It is not a de Polignac number, because 21357065576575 - 2²³ = 21357057187967 is a prime.

It is a super-2 number, since 2×21357065576575² (a number of 27 digits) contains 22 as substring.

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 11 ways as a sum of consecutive naturals, for example, 143792839 + ... + 143941288.

It is an arithmetic number, because the mean of its divisors is an integer number (2207640097080).

Almost surely, 2^{21357065576575} is an apocalyptic number.

21357065576575 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21357065576575 is a deficient number, since it is larger than the sum of its proper divisors (5134615588385).

21357065576575 is a wasteful number, since it uses less digits than its factorization.

21357065576575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287737106 (or 287737101 counting only the distinct ones).

The product of its (nonzero) digits is 231525000, while the sum is 64.

The spelling of 21357065576575 in words is "twenty-one trillion, three hundred fifty-seven billion, sixty-five million, five hundred seventy-six thousand, five hundred seventy-five".