20012000220 has 72 divisors (see below), whose sum is σ = 60743251296. Its totient is φ = 5333000832.

The previous prime is 20012000219. The next prime is 20012000243. The reversal of 20012000220 is 2200021002.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 241714 + ... + 313766.

It is an arithmetic number, because the mean of its divisors is an integer number (843656268).

Almost surely, 2^20012000220 is an apocalyptic number.

20012000220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20012000220 is an abundant number, since it is smaller than the sum of its proper divisors (40731251076).

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

20012000220 is a wasteful number, since it uses less digits than its factorization.

20012000220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73611 (or 73606 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

Adding to 20012000220 its reverse (2200021002), we get a palindrome (22212021222).

The spelling of 20012000220 in words is "twenty billion, twelve million, two hundred twenty", and thus it is an aban number.