20102103220 has 48 divisors (see below), whose sum is σ = 44804612160. Its totient is φ = 7549735424.

The previous prime is 20102103209. The next prime is 20102103257. The reversal of 20102103220 is 2230120102.

It is a self number, because there is not a number n which added to its sum of digits gives 20102103220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71907 + ... + 213013.

It is an arithmetic number, because the mean of its divisors is an integer number (933429420).

Almost surely, 2^20102103220 is an apocalyptic number.

20102103220 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 20102103220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22402306080).

20102103220 is an abundant number, since it is smaller than the sum of its proper divisors (24702508940).

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

20102103220 is a wasteful number, since it uses less digits than its factorization.

20102103220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141552 (or 141550 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 20102103220 its reverse (2230120102), we get a palindrome (22332223322).

The spelling of 20102103220 in words is "twenty billion, one hundred two million, one hundred three thousand, two hundred twenty".