20353630 has 32 divisors (see below), whose sum is σ = 40951008. Its totient is φ = 7219200.

The previous prime is 20353609. The next prime is 20353633. The reversal of 20353630 is 3635302.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20353633) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2254 + ... + 6766.

It is an arithmetic number, because the mean of its divisors is an integer number (1279719).

Almost surely, 2^20353630 is an apocalyptic number.

20353630 is an abundant number, since it is smaller than the sum of its proper divisors (20597378).

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

20353630 is a wasteful number, since it uses less digits than its factorization.

20353630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4572.

The product of its (nonzero) digits is 1620, while the sum is 22.

The square root of 20353630 is about 4511.4997506373. The cubic root of 20353630 is about 273.0322565615.

Adding to 20353630 its reverse (3635302), we get a palindrome (23988932).

It can be divided in two parts, 2035 and 3630, that added together give a palindrome (5665).

The spelling of 20353630 in words is "twenty million, three hundred fifty-three thousand, six hundred thirty".