21364252105065 has 32 divisors (see below), whose sum is σ = 34599884140800. Its totient is φ = 11255754835200.

The previous prime is 21364252105019. The next prime is 21364252105169. The reversal of 21364252105065 is 56050125246312.

It is not a de Polignac number, because 21364252105065 - 2⁹ = 21364252104553 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15396210 + ... + 16726379.

It is an arithmetic number, because the mean of its divisors is an integer number (1081246379400).

Almost surely, 2^{21364252105065} is an apocalyptic number.

It is an amenable number.

21364252105065 is a deficient number, since it is larger than the sum of its proper divisors (13235632035735).

21364252105065 is a wasteful number, since it uses less digits than its factorization.

21364252105065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32123137.

The product of its (nonzero) digits is 432000, while the sum is 42.

The spelling of 21364252105065 in words is "twenty-one trillion, three hundred sixty-four billion, two hundred fifty-two million, one hundred five thousand, sixty-five".