21354617044003 has 4 divisors (see below), whose sum is σ = 21357393623928. Its totient is φ = 21351840464080.

The previous prime is 21354617043973. The next prime is 21354617044031. The reversal of 21354617044003 is 30044071645312.

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 21354617044003 - 2⁹ = 21354617043491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21354617054003) 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, 1388278426 + ... + 1388293807.

It is an arithmetic number, because the mean of its divisors is an integer number (5339348405982).

Almost surely, 2^{21354617044003} is an apocalyptic number.

21354617044003 is a deficient number, since it is larger than the sum of its proper divisors (2776579925).

21354617044003 is an equidigital number, since it uses as much as digits as its factorization.

21354617044003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2776579924.

The product of its (nonzero) digits is 241920, while the sum is 40.

Adding to 21354617044003 its reverse (30044071645312), we get a palindrome (51398688689315).

The spelling of 21354617044003 in words is "twenty-one trillion, three hundred fifty-four billion, six hundred seventeen million, forty-four thousand, three".