21444363353 has 8 divisors (see below), whose sum is σ = 24534871872. Its totient is φ = 18360611856.

The previous prime is 21444363307. The next prime is 21444363361. The reversal of 21444363353 is 35336344412.

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

It is a cyclic number.

It is not a de Polignac number, because 21444363353 - 2¹⁶ = 21444297817 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21444363253) 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, 1682450 + ... + 1695147.

It is an arithmetic number, because the mean of its divisors is an integer number (3066858984).

Almost surely, 2^21444363353 is an apocalyptic number.

It is an amenable number.

21444363353 is a deficient number, since it is larger than the sum of its proper divisors (3090508519).

21444363353 is an equidigital number, since it uses as much as digits as its factorization.

21444363353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3378511.

The product of its digits is 311040, while the sum is 38.

The spelling of 21444363353 in words is "twenty-one billion, four hundred forty-four million, three hundred sixty-three thousand, three hundred fifty-three".