21110544453 has 8 divisors (see below), whose sum is σ = 29628834400. Its totient is φ = 13332975408.

The previous prime is 21110544443. The next prime is 21110544467. The reversal of 21110544453 is 35444501112.

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

It is not a de Polignac number, because 21110544453 - 2⁴ = 21110544437 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 21110544453.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21110544443) 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, 185180158 + ... + 185180271.

It is an arithmetic number, because the mean of its divisors is an integer number (3703604300).

Almost surely, 2^21110544453 is an apocalyptic number.

It is an amenable number.

21110544453 is a deficient number, since it is larger than the sum of its proper divisors (8518289947).

21110544453 is a wasteful number, since it uses less digits than its factorization.

21110544453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370360451.

The product of its (nonzero) digits is 9600, while the sum is 30.

The spelling of 21110544453 in words is "twenty-one billion, one hundred ten million, five hundred forty-four thousand, four hundred fifty-three".