21364517070465 has 16 divisors (see below), whose sum is σ = 35285912065536. Its totient is φ = 11026847520000.

The previous prime is 21364517070433. The next prime is 21364517070503. The reversal of 21364517070465 is 56407071546312.

It is not a de Polignac number, because 21364517070465 - 2⁵ = 21364517070433 is a prime.

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, 22972598536 + ... + 22972599465.

It is an arithmetic number, because the mean of its divisors is an integer number (2205369504096).

Almost surely, 2^{21364517070465} is an apocalyptic number.

It is an amenable number.

21364517070465 is a deficient number, since it is larger than the sum of its proper divisors (13921394995071).

21364517070465 is a wasteful number, since it uses less digits than its factorization.

21364517070465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45945198040.

The product of its (nonzero) digits is 4233600, while the sum is 51.

The spelling of 21364517070465 in words is "twenty-one trillion, three hundred sixty-four billion, five hundred seventeen million, seventy thousand, four hundred sixty-five".