21322042 has 8 divisors (see below), whose sum is σ = 36552096. Its totient is φ = 9138012.

The previous prime is 21322031. The next prime is 21322043. The reversal of 21322042 is 24022312.

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 (21322043) 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, 761488 + ... + 761515.

It is an arithmetic number, because the mean of its divisors is an integer number (4569012).

Almost surely, 2^21322042 is an apocalyptic number.

21322042 is a deficient number, since it is larger than the sum of its proper divisors (15230054).

21322042 is a wasteful number, since it uses less digits than its factorization.

21322042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1523012.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 21322042 is about 4617.5796690474. The cubic root of 21322042 is about 277.2955700220.

Adding to 21322042 its reverse (24022312), we get a palindrome (45344354).

The spelling of 21322042 in words is "twenty-one million, three hundred twenty-two thousand, forty-two".