21300484399 has 4 divisors (see below), whose sum is σ = 21300833664. Its totient is φ = 21300135136.

The previous prime is 21300484397. The next prime is 21300484417. The reversal of 21300484399 is 99348400312.

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 21300484399 - 2¹ = 21300484397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21300484397) 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, 56527 + ... + 214000.

It is an arithmetic number, because the mean of its divisors is an integer number (5325208416).

Almost surely, 2^21300484399 is an apocalyptic number.

21300484399 is a deficient number, since it is larger than the sum of its proper divisors (349265).

21300484399 is an equidigital number, since it uses as much as digits as its factorization.

21300484399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349264.

The product of its (nonzero) digits is 186624, while the sum is 43.

The spelling of 21300484399 in words is "twenty-one billion, three hundred million, four hundred eighty-four thousand, three hundred ninety-nine".