21442333223 has 16 divisors (see below), whose sum is σ = 22896276480. Its totient is φ = 20010057600.

The previous prime is 21442333153. The next prime is 21442333249. The reversal of 21442333223 is 32233324412.

It is a cyclic number.

It is not a de Polignac number, because 21442333223 - 2¹⁴ = 21442316839 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 (21442333723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3201308 + ... + 3207998.

It is an arithmetic number, because the mean of its divisors is an integer number (1431017280).

Almost surely, 2^21442333223 is an apocalyptic number.

21442333223 is a deficient number, since it is larger than the sum of its proper divisors (1453943257).

21442333223 is a wasteful number, since it uses less digits than its factorization.

21442333223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8278.

The product of its digits is 20736, while the sum is 29.

Adding to 21442333223 its reverse (32233324412), we get a palindrome (53675657635).

It can be divided in two parts, 21 and 442333223, that added together give a palindrome (442333244).

The spelling of 21442333223 in words is "twenty-one billion, four hundred forty-two million, three hundred thirty-three thousand, two hundred twenty-three".