21441513243 has 16 divisors (see below), whose sum is σ = 30104758400. Its totient is φ = 13536875520.

The previous prime is 21441513241. The next prime is 21441513257. The reversal of 21441513243 is 34231514412.

It is not a de Polignac number, because 21441513243 - 2¹ = 21441513241 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 21441513243.

It is not an unprimeable number, because it can be changed into a prime (21441513241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83328 + ... + 223218.

It is an arithmetic number, because the mean of its divisors is an integer number (1881547400).

Almost surely, 2^21441513243 is an apocalyptic number.

21441513243 is a deficient number, since it is larger than the sum of its proper divisors (8663245157).

21441513243 is a wasteful number, since it uses less digits than its factorization.

21441513243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142602.

The product of its digits is 11520, while the sum is 30.

The spelling of 21441513243 in words is "twenty-one billion, four hundred forty-one million, five hundred thirteen thousand, two hundred forty-three".