21432442321242 has 32 divisors (see below), whose sum is σ = 47760317193600. Its totient is φ = 7124247301824.

The previous prime is 21432442321217. The next prime is 21432442321249. The reversal of 21432442321242 is 24212324423412.

21432442321242 is a `hidden beast` number, since 2 + 1 + 4 + 324 + 4 + 2 + 321 + 2 + 4 + 2 = 666.

It is a super-3 number, since 3×21432442321242³ (a number of 41 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21432442321197 and 21432442321206.

It is not an unprimeable number, because it can be changed into a prime (21432442321249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 552762063 + ... + 552800834.

It is an arithmetic number, because the mean of its divisors is an integer number (1492509912300).

Almost surely, 2^{21432442321242} is an apocalyptic number.

21432442321242 is an abundant number, since it is smaller than the sum of its proper divisors (26327874872358).

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

21432442321242 is a wasteful number, since it uses less digits than its factorization.

21432442321242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1105563267 (or 1105563261 counting only the distinct ones).

The product of its digits is 147456, while the sum is 36.

Adding to 21432442321242 its reverse (24212324423412), we get a palindrome (45644766744654).

The spelling of 21432442321242 in words is "twenty-one trillion, four hundred thirty-two billion, four hundred forty-two million, three hundred twenty-one thousand, two hundred forty-two".