21442142345424 has 40 divisors (see below), whose sum is σ = 55640596607232. Its totient is φ = 7115329743360.

The previous prime is 21442142345423. The next prime is 21442142345467. The reversal of 21442142345424 is 42454324124412.

It is a super-2 number, since 2×21442142345424² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21442142345423) 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 7 ways as a sum of consecutive naturals, for example, 1001584137 + ... + 1001605544.

Almost surely, 2^{21442142345424} is an apocalyptic number.

21442142345424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21442142345424 is an abundant number, since it is smaller than the sum of its proper divisors (34198454261808).

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

21442142345424 is a wasteful number, since it uses less digits than its factorization.

21442142345424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2003189915 (or 2003189909 counting only the distinct ones).

The product of its digits is 983040, while the sum is 42.

Adding to 21442142345424 its reverse (42454324124412), we get a palindrome (63896466469836).

The spelling of 21442142345424 in words is "twenty-one trillion, four hundred forty-two billion, one hundred forty-two million, three hundred forty-five thousand, four hundred twenty-four".