21443620603 has 8 divisors (see below), whose sum is σ = 21559578768. Its totient is φ = 21327851424.

The previous prime is 21443620559. The next prime is 21443620687. The reversal of 21443620603 is 30602634412.

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

It is a cyclic number.

It is not a de Polignac number, because 21443620603 - 2¹⁷ = 21443489531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21443650603) 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 7 ways as a sum of consecutive naturals, for example, 183325 + ... + 276577.

It is an arithmetic number, because the mean of its divisors is an integer number (2694947346).

Almost surely, 2^21443620603 is an apocalyptic number.

21443620603 is a deficient number, since it is larger than the sum of its proper divisors (115958165).

21443620603 is a wasteful number, since it uses less digits than its factorization.

21443620603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94493.

The product of its (nonzero) digits is 20736, while the sum is 31.

The spelling of 21443620603 in words is "twenty-one billion, four hundred forty-three million, six hundred twenty thousand, six hundred three".