21483601247 has 4 divisors (see below), whose sum is σ = 21488911200. Its totient is φ = 21478291296.

The previous prime is 21483601229. The next prime is 21483601261. The reversal of 21483601247 is 74210638412.

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 21483601247 - 2²⁰ = 21482552671 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 21483601247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21483601747) 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 3 ways as a sum of consecutive naturals, for example, 2648903 + ... + 2657000.

It is an arithmetic number, because the mean of its divisors is an integer number (5372227800).

Almost surely, 2^21483601247 is an apocalyptic number.

21483601247 is a deficient number, since it is larger than the sum of its proper divisors (5309953).

21483601247 is an equidigital number, since it uses as much as digits as its factorization.

21483601247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5309952.

The product of its (nonzero) digits is 64512, while the sum is 38.

The spelling of 21483601247 in words is "twenty-one billion, four hundred eighty-three million, six hundred one thousand, two hundred forty-seven".