21454444043233 has 8 divisors (see below), whose sum is σ = 21458083514400. Its totient is φ = 21450804830688.

The previous prime is 21454444043191. The next prime is 21454444043237. The reversal of 21454444043233 is 33234044445412.

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-21454444043233 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 21454444043233.

It is not an unprimeable number, because it can be changed into a prime (21454444043237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 231996558 + ... + 232089016.

It is an arithmetic number, because the mean of its divisors is an integer number (2682260439300).

Almost surely, 2^{21454444043233} is an apocalyptic number.

It is an amenable number.

21454444043233 is a deficient number, since it is larger than the sum of its proper divisors (3639471167).

21454444043233 is an equidigital number, since it uses as much as digits as its factorization.

21454444043233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129311.

The product of its (nonzero) digits is 2211840, while the sum is 43.

Adding to 21454444043233 its reverse (33234044445412), we get a palindrome (54688488488645).

The spelling of 21454444043233 in words is "twenty-one trillion, four hundred fifty-four billion, four hundred forty-four million, forty-three thousand, two hundred thirty-three".