20322630 has 32 divisors (see below), whose sum is σ = 54194400. Its totient is φ = 5419296.

The previous prime is 20322623. The next prime is 20322661. The reversal of 20322630 is 3622302.

20322630 is a `hidden beast` number, since 2 + 0 + 32 + 2 + 630 = 666.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 37365 + ... + 37904.

It is an arithmetic number, because the mean of its divisors is an integer number (1693575).

Almost surely, 2^20322630 is an apocalyptic number.

20322630 is an abundant number, since it is smaller than the sum of its proper divisors (33871770).

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

20322630 is a wasteful number, since it uses less digits than its factorization.

20322630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75285 (or 75279 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 20322630 is about 4508.0627768477. The cubic root of 20322630 is about 272.8935703962.

Adding to 20322630 its reverse (3622302), we get a palindrome (23944932).

The spelling of 20322630 in words is "twenty million, three hundred twenty-two thousand, six hundred thirty".