21442003242 has 16 divisors (see below), whose sum is σ = 46782552672. Its totient is φ = 6497576720.

The previous prime is 21442003169. The next prime is 21442003333. The reversal of 21442003242 is 24230024412.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162439353 + ... + 162439484.

It is an arithmetic number, because the mean of its divisors is an integer number (2923909542).

Almost surely, 2^21442003242 is an apocalyptic number.

21442003242 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21442003242 is an abundant number, since it is smaller than the sum of its proper divisors (25340549430).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21442003242 is a wasteful number, since it uses less digits than its factorization.

21442003242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324878853.

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 21442003242 its reverse (24230024412), we get a palindrome (45672027654).

The spelling of 21442003242 in words is "twenty-one billion, four hundred forty-two million, three thousand, two hundred forty-two".