30021822 has 24 divisors (see below), whose sum is σ = 65682864. Its totient is φ = 9909504.

The previous prime is 30021809. The next prime is 30021833. The reversal of 30021822 is 22812003.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 30021795 and 30021804.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6243 + ... + 9950.

It is an arithmetic number, because the mean of its divisors is an integer number (2736786).

Almost surely, 2^30021822 is an apocalyptic number.

30021822 is an abundant number, since it is smaller than the sum of its proper divisors (35661042).

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

30021822 is a wasteful number, since it uses less digits than its factorization.

30021822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16304 (or 16301 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 30021822 is about 5479.2172798676. The cubic root of 30021822 is about 310.7985723661.

Adding to 30021822 its reverse (22812003), we get a palindrome (52833825).

It can be divided in two parts, 300 and 21822, that added together give a palindrome (22122).

The spelling of 30021822 in words is "thirty million, twenty-one thousand, eight hundred twenty-two".