21014566265 has 32 divisors (see below), whose sum is σ = 31472271360. Its totient is φ = 13086532800.

The previous prime is 21014566247. The next prime is 21014566267. The reversal of 21014566265 is 56266541012.

It is not a de Polignac number, because 21014566265 - 2²⁰ = 21013517689 is a prime.

It is a super-2 number, since 2×21014566265² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21014566267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 353996 + ... + 409074.

It is an arithmetic number, because the mean of its divisors is an integer number (983508480).

Almost surely, 2^21014566265 is an apocalyptic number.

It is an amenable number.

21014566265 is a deficient number, since it is larger than the sum of its proper divisors (10457705095).

21014566265 is a wasteful number, since it uses less digits than its factorization.

21014566265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56093.

The product of its (nonzero) digits is 86400, while the sum is 38.

The spelling of 21014566265 in words is "twenty-one billion, fourteen million, five hundred sixty-six thousand, two hundred sixty-five".