21442023394356 has 24 divisors (see below), whose sum is σ = 50209435571904. Its totient is φ = 7121905752640.

The previous prime is 21442023394241. The next prime is 21442023394357. The reversal of 21442023394356 is 65349332024412.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21442023394357) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3179418840 + ... + 3179425583.

It is an arithmetic number, because the mean of its divisors is an integer number (2092059815496).

Almost surely, 2^{21442023394356} is an apocalyptic number.

It is an amenable number.

21442023394356 is an abundant number, since it is smaller than the sum of its proper divisors (28767412177548).

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

21442023394356 is a wasteful number, since it uses less digits than its factorization.

21442023394356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6358844711 (or 6358844709 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 48.

The spelling of 21442023394356 in words is "twenty-one trillion, four hundred forty-two billion, twenty-three million, three hundred ninety-four thousand, three hundred fifty-six".