21601630674359 has 4 divisors (see below), whose sum is σ = 21824327897904. Its totient is φ = 21378933450816.

The previous prime is 21601630674307. The next prime is 21601630674391. The reversal of 21601630674359 is 95347603610612.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21601630674359 - 2³² = 21597335707063 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21601630674359.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21601630670359) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111348611627 + ... + 111348611820.

It is an arithmetic number, because the mean of its divisors is an integer number (5456081974476).

Almost surely, 2^{21601630674359} is an apocalyptic number.

21601630674359 is a deficient number, since it is larger than the sum of its proper divisors (222697223545).

21601630674359 is an equidigital number, since it uses as much as digits as its factorization.

21601630674359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222697223544.

The product of its (nonzero) digits is 4898880, while the sum is 53.

The spelling of 21601630674359 in words is "twenty-one trillion, six hundred one billion, six hundred thirty million, six hundred seventy-four thousand, three hundred fifty-nine".