21735336223147 has 8 divisors (see below), whose sum is σ = 21814670339136. Its totient is φ = 21656019930312.

The previous prime is 21735336223127. The next prime is 21735336223151. The reversal of 21735336223147 is 74132263353712.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21735336223147 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 21735336223147.

It is not an unprimeable number, because it can be changed into a prime (21735336223127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2009893 + ... + 6892774.

It is an arithmetic number, because the mean of its divisors is an integer number (2726833792392).

Almost surely, 2^{21735336223147} is an apocalyptic number.

21735336223147 is a deficient number, since it is larger than the sum of its proper divisors (79334115989).

21735336223147 is an equidigital number, since it uses as much as digits as its factorization.

21735336223147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8911577.

The product of its digits is 3810240, while the sum is 49.

Adding to 21735336223147 its reverse (74132263353712), we get a palindrome (95867599576859).

The spelling of 21735336223147 in words is "twenty-one trillion, seven hundred thirty-five billion, three hundred thirty-six million, two hundred twenty-three thousand, one hundred forty-seven".