21442535603 has 4 divisors (see below), whose sum is σ = 21642933240. Its totient is φ = 21242137968.

The previous prime is 21442535599. The next prime is 21442535627. The reversal of 21442535603 is 30653524412.

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 21442535603 - 2² = 21442535599 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21442535203) 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, 100198658 + ... + 100198871.

It is an arithmetic number, because the mean of its divisors is an integer number (5410733310).

Almost surely, 2^21442535603 is an apocalyptic number.

21442535603 is a deficient number, since it is larger than the sum of its proper divisors (200397637).

21442535603 is a wasteful number, since it uses less digits than its factorization.

21442535603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200397636.

The product of its (nonzero) digits is 86400, while the sum is 35.

The spelling of 21442535603 in words is "twenty-one billion, four hundred forty-two million, five hundred thirty-five thousand, six hundred three".