21322030 has 32 divisors (see below), whose sum is σ = 39297024. Its totient is φ = 8328096.

The previous prime is 21322019. The next prime is 21322031. The reversal of 21322030 is 3022312.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21322030.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21322031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130729 + ... + 130891.

It is an arithmetic number, because the mean of its divisors is an integer number (1228032).

Almost surely, 2^21322030 is an apocalyptic number.

21322030 is a deficient number, since it is larger than the sum of its proper divisors (17974994).

21322030 is a wasteful number, since it uses less digits than its factorization.

21322030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 21322030 is about 4617.5783696652. The cubic root of 21322030 is about 277.2955180016.

Adding to 21322030 its reverse (3022312), we get a palindrome (24344342).

The spelling of 21322030 in words is "twenty-one million, three hundred twenty-two thousand, thirty".