21852912489265 has 64 divisors (see below), whose sum is σ = 32629488837120. Its totient is φ = 13803609968640.

The previous prime is 21852912489259. The next prime is 21852912489307. The reversal of 21852912489265 is 56298421925812.

It is not a de Polignac number, because 21852912489265 - 2²⁷ = 21852778271537 is a prime.

It is a Smith number, since the sum of its digits (64) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 21852912489197 and 21852912489206.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 43007067 + ... + 43512223.

It is an arithmetic number, because the mean of its divisors is an integer number (509835763080).

Almost surely, 2^{21852912489265} is an apocalyptic number.

It is an amenable number.

21852912489265 is a deficient number, since it is larger than the sum of its proper divisors (10776576347855).

21852912489265 is a wasteful number, since it uses less digits than its factorization.

21852912489265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508762.

The product of its digits is 49766400, while the sum is 64.

The spelling of 21852912489265 in words is "twenty-one trillion, eight hundred fifty-two billion, nine hundred twelve million, four hundred eighty-nine thousand, two hundred sixty-five".