21604746670315 has 16 divisors (see below), whose sum is σ = 27479908925280. Its totient is φ = 16249816276480.

The previous prime is 21604746670307. The next prime is 21604746670333. The reversal of 21604746670315 is 51307664740612.

It is not a de Polignac number, because 21604746670315 - 2³ = 21604746670307 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, 134975005 + ... + 135134974.

It is an arithmetic number, because the mean of its divisors is an integer number (1717494307830).

Almost surely, 2^{21604746670315} is an apocalyptic number.

21604746670315 is a deficient number, since it is larger than the sum of its proper divisors (5875162254965).

21604746670315 is a wasteful number, since it uses less digits than its factorization.

21604746670315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270110942.

The product of its (nonzero) digits is 5080320, while the sum is 52.

The spelling of 21604746670315 in words is "twenty-one trillion, six hundred four billion, seven hundred forty-six million, six hundred seventy thousand, three hundred fifteen".