21454523421113 has 8 divisors (see below), whose sum is σ = 21463403068800. Its totient is φ = 21445644146400.

The previous prime is 21454523420999. The next prime is 21454523421157. The reversal of 21454523421113 is 31112432545412.

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-21454523421113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21454523421193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 216910556 + ... + 217009442.

It is an arithmetic number, because the mean of its divisors is an integer number (2682925383600).

Almost surely, 2^{21454523421113} is an apocalyptic number.

It is an amenable number.

21454523421113 is a deficient number, since it is larger than the sum of its proper divisors (8879647687).

21454523421113 is an equidigital number, since it uses as much as digits as its factorization.

21454523421113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186487.

The product of its digits is 115200, while the sum is 38.

Adding to 21454523421113 its reverse (31112432545412), we get a palindrome (52566955966525).

The spelling of 21454523421113 in words is "twenty-one trillion, four hundred fifty-four billion, five hundred twenty-three million, four hundred twenty-one thousand, one hundred thirteen".