21344583669 has 16 divisors (see below), whose sum is σ = 28912256640. Its totient is φ = 14004038720.

The previous prime is 21344583649. The next prime is 21344583691. The reversal of 21344583669 is 96638544312.

It is a cyclic number.

It is not a de Polignac number, because 21344583669 - 2⁹ = 21344583157 is a prime.

It is a super-2 number, since 2×21344583669² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21344583649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28687 + ... + 208595.

It is an arithmetic number, because the mean of its divisors is an integer number (1807016040).

Almost surely, 2^21344583669 is an apocalyptic number.

It is an amenable number.

21344583669 is a deficient number, since it is larger than the sum of its proper divisors (7567672971).

21344583669 is a wasteful number, since it uses less digits than its factorization.

21344583669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180540.

The product of its digits is 3732480, while the sum is 51.

The spelling of 21344583669 in words is "twenty-one billion, three hundred forty-four million, five hundred eighty-three thousand, six hundred sixty-nine".