21444133342 has 16 divisors (see below), whose sum is σ = 32392609200. Its totient is φ = 10646644032.

The previous prime is 21444133303. The next prime is 21444133351. The reversal of 21444133342 is 24333144412.

It is a congruent number.

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, 1075738 + ... + 1095490.

It is an arithmetic number, because the mean of its divisors is an integer number (2024538075).

Almost surely, 2^21444133342 is an apocalyptic number.

21444133342 is a deficient number, since it is larger than the sum of its proper divisors (10948475858).

21444133342 is a wasteful number, since it uses less digits than its factorization.

21444133342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23547.

The product of its digits is 27648, while the sum is 31.

Adding to 21444133342 its reverse (24333144412), we get a palindrome (45777277754).

The spelling of 21444133342 in words is "twenty-one billion, four hundred forty-four million, one hundred thirty-three thousand, three hundred forty-two".