21442012422 has 8 divisors (see below), whose sum is σ = 42884024856. Its totient is φ = 7147337472.

The previous prime is 21442012391. The next prime is 21442012429. The reversal of 21442012422 is 22421024412.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

21442012422 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 21442012392 and 21442012401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21442012429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1786834363 + ... + 1786834374.

It is an arithmetic number, because the mean of its divisors is an integer number (5360503107).

Almost surely, 2^21442012422 is an apocalyptic number.

21442012422 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21442012422 is a wasteful number, since it uses less digits than its factorization.

21442012422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3573668742.

The product of its (nonzero) digits is 2048, while the sum is 24.

Adding to 21442012422 its reverse (22421024412), we get a palindrome (43863036834).

The spelling of 21442012422 in words is "twenty-one billion, four hundred forty-two million, twelve thousand, four hundred twenty-two".