20012333220 has 144 divisors (see below), whose sum is σ = 66282390720. Its totient is φ = 4847097600.

The previous prime is 20012333147. The next prime is 20012333273. The reversal of 20012333220 is 2233321002.

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 = 20012333193 and 20012333202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2552266 + ... + 2560094.

It is an arithmetic number, because the mean of its divisors is an integer number (460294380).

Almost surely, 2^20012333220 is an apocalyptic number.

20012333220 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 20012333220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33141195360).

20012333220 is an abundant number, since it is smaller than the sum of its proper divisors (46270057500).

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

20012333220 is a wasteful number, since it uses less digits than its factorization.

20012333220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9146 (or 9141 counting only the distinct ones).

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

Adding to 20012333220 its reverse (2233321002), we get a palindrome (22245654222).

The spelling of 20012333220 in words is "twenty billion, twelve million, three hundred thirty-three thousand, two hundred twenty".