21338421599 has 8 divisors (see below), whose sum is σ = 24503450880. Its totient is φ = 18377587800.

The previous prime is 21338421583. The next prime is 21338421659. The reversal of 21338421599 is 99512483312.

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

It is not a de Polignac number, because 21338421599 - 2⁴ = 21338421583 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 (21338421569) 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, 51048647 + ... + 51049064.

It is an arithmetic number, because the mean of its divisors is an integer number (3062931360).

Almost surely, 2^21338421599 is an apocalyptic number.

21338421599 is a deficient number, since it is larger than the sum of its proper divisors (3165029281).

21338421599 is a wasteful number, since it uses less digits than its factorization.

21338421599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102097741.

The product of its digits is 466560, while the sum is 47.

The spelling of 21338421599 in words is "twenty-one billion, three hundred thirty-eight million, four hundred twenty-one thousand, five hundred ninety-nine".