20301332220 has 144 divisors (see below), whose sum is σ = 66382636320. Its totient is φ = 4992357888.

The previous prime is 20301332203. The next prime is 20301332269. The reversal of 20301332220 is 2223310302.

It is a happy number.

20301332220 is a `hidden beast` number, since 20 + 301 + 3 + 322 + 20 = 666.

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 = 20301332193 and 20301332202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2773926 + ... + 2781234.

It is an arithmetic number, because the mean of its divisors is an integer number (460990530).

Almost surely, 2^20301332220 is an apocalyptic number.

20301332220 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 20301332220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33191318160).

20301332220 is an abundant number, since it is smaller than the sum of its proper divisors (46081304100).

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

20301332220 is a wasteful number, since it uses less digits than its factorization.

20301332220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8524 (or 8519 counting only the distinct ones).

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

Adding to 20301332220 its reverse (2223310302), we get a palindrome (22524642522).

The spelling of 20301332220 in words is "twenty billion, three hundred one million, three hundred thirty-two thousand, two hundred twenty".