21442034024 has 16 divisors (see below), whose sum is σ = 40216875300. Its totient is φ = 10717533952.

The previous prime is 21442034011. The next prime is 21442034101. The reversal of 21442034024 is 42043024412.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 15918868900 + 5523165124 = 126170^2 + 74318^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21442033984 and 21442034002.

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 3 ways as a sum of consecutive naturals, for example, 409127 + ... + 458550.

Almost surely, 2^21442034024 is an apocalyptic number.

It is an amenable number.

21442034024 is a deficient number, since it is larger than the sum of its proper divisors (18774841276).

21442034024 is a wasteful number, since it uses less digits than its factorization.

21442034024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870772 (or 870768 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 26.

Adding to 21442034024 its reverse (42043024412), we get a palindrome (63485058436).

The spelling of 21442034024 in words is "twenty-one billion, four hundred forty-two million, thirty-four thousand, twenty-four".