21323200442 has 8 divisors (see below), whose sum is σ = 32136388032. Its totient is φ = 10611071100.

The previous prime is 21323200427. The next prime is 21323200447. The reversal of 21323200442 is 24400232312.

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

It is not an unprimeable number, because it can be changed into a prime (21323200447) 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 3 ways as a sum of consecutive naturals, for example, 25264034 + ... + 25264877.

It is an arithmetic number, because the mean of its divisors is an integer number (4017048504).

Almost surely, 2^21323200442 is an apocalyptic number.

21323200442 is a deficient number, since it is larger than the sum of its proper divisors (10813187590).

21323200442 is a wasteful number, since it uses less digits than its factorization.

21323200442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50529124.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 21323200442 its reverse (24400232312), we get a palindrome (45723432754).

The spelling of 21323200442 in words is "twenty-one billion, three hundred twenty-three million, two hundred thousand, four hundred forty-two".