20633353220 has 48 divisors (see below), whose sum is σ = 45960784128. Its totient is φ = 7753981440.

The previous prime is 20633353217. The next prime is 20633353229. The reversal of 20633353220 is 2235333602.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20633353229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137525 + ... + 245315.

It is an arithmetic number, because the mean of its divisors is an integer number (957516336).

Almost surely, 2^20633353220 is an apocalyptic number.

20633353220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20633353220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22980392064).

20633353220 is an abundant number, since it is smaller than the sum of its proper divisors (25327430908).

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

20633353220 is a wasteful number, since it uses less digits than its factorization.

20633353220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108380 (or 108378 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 29.

Adding to 20633353220 its reverse (2235333602), we get a palindrome (22868686822).

The spelling of 20633353220 in words is "twenty billion, six hundred thirty-three million, three hundred fifty-three thousand, two hundred twenty".