20100002220 has 72 divisors (see below), whose sum is σ = 63620889696. Its totient is φ = 5126956032.

The previous prime is 20100002203. The next prime is 20100002231. The reversal of 20100002220 is 2220000102.

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

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 23 ways as a sum of consecutive naturals, for example, 2423397 + ... + 2431676.

It is an arithmetic number, because the mean of its divisors is an integer number (883623468).

Almost surely, 2^20100002220 is an apocalyptic number.

20100002220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20100002220 is an abundant number, since it is smaller than the sum of its proper divisors (43520887476).

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

20100002220 is a wasteful number, since it uses less digits than its factorization.

20100002220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4855111 (or 4855106 counting only the distinct ones).

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

Adding to 20100002220 its reverse (2220000102), we get a palindrome (22320002322).

The spelling of 20100002220 in words is "twenty billion, one hundred million, two thousand, two hundred twenty".