20120002220 has 48 divisors (see below), whose sum is σ = 43800825600. Its totient is φ = 7754154240.

The previous prime is 20120002211. The next prime is 20120002229. The reversal of 20120002220 is 2220002102.

It is an interprime number because it is at equal distance from previous prime (20120002211) and next prime (20120002229).

It is not an unprimeable number, because it can be changed into a prime (20120002229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 241610 + ... + 314030.

It is an arithmetic number, because the mean of its divisors is an integer number (912517200).

Almost surely, 2^20120002220 is an apocalyptic number.

20120002220 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 20120002220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21900412800).

20120002220 is an abundant number, since it is smaller than the sum of its proper divisors (23680823380).

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

20120002220 is a wasteful number, since it uses less digits than its factorization.

20120002220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72938 (or 72936 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

Adding to 20120002220 its reverse (2220002102), we get a palindrome (22340004322).

The spelling of 20120002220 in words is "twenty billion, one hundred twenty million, two thousand, two hundred twenty".