21443000042442 has 16 divisors (see below), whose sum is σ = 46784727365472. Its totient is φ = 6497878800720.

The previous prime is 21443000042437. The next prime is 21443000042473. The reversal of 21443000042442 is 24424000034412.

It is a super-2 number, since 2×21443000042442² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 162446969953 + ... + 162446970084.

It is an arithmetic number, because the mean of its divisors is an integer number (2924045460342).

Almost surely, 2^{21443000042442} is an apocalyptic number.

21443000042442 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21443000042442 is an abundant number, since it is smaller than the sum of its proper divisors (25341727323030).

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

21443000042442 is a wasteful number, since it uses less digits than its factorization.

21443000042442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324893940053.

The product of its (nonzero) digits is 24576, while the sum is 30.

Adding to 21443000042442 its reverse (24424000034412), we get a palindrome (45867000076854).

The spelling of 21443000042442 in words is "twenty-one trillion, four hundred forty-three billion, forty-two thousand, four hundred forty-two".