21350022 has 8 divisors (see below), whose sum is σ = 42700056. Its totient is φ = 7116672.

The previous prime is 21350009. The next prime is 21350027. The reversal of 21350022 is 22005312.

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

21350022 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 21349983 and 21350010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21350027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1779163 + ... + 1779174.

It is an arithmetic number, because the mean of its divisors is an integer number (5337507).

Almost surely, 2^21350022 is an apocalyptic number.

21350022 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.

21350022 is a wasteful number, since it uses less digits than its factorization.

21350022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3558342.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 21350022 is about 4620.6084014987. The cubic root of 21350022 is about 277.4168113600.

Adding to 21350022 its reverse (22005312), we get a palindrome (43355334).

The spelling of 21350022 in words is "twenty-one million, three hundred fifty thousand, twenty-two".