21442204503 has 12 divisors (see below), whose sum is σ = 32318685360. Its totient is φ = 13673289696.

The previous prime is 21442204447. The next prime is 21442204513. The reversal of 21442204503 is 30540224412.

It is not a de Polignac number, because 21442204503 - 2¹⁷ = 21442073431 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21442204513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51792558 + ... + 51792971.

It is an arithmetic number, because the mean of its divisors is an integer number (2693223780).

Almost surely, 2^21442204503 is an apocalyptic number.

21442204503 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21442204503 is a deficient number, since it is larger than the sum of its proper divisors (10876480857).

21442204503 is a wasteful number, since it uses less digits than its factorization.

21442204503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103585558 (or 103585555 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

Adding to 21442204503 its reverse (30540224412), we get a palindrome (51982428915).

The spelling of 21442204503 in words is "twenty-one billion, four hundred forty-two million, two hundred four thousand, five hundred three".