20102301220 has 12 divisors (see below), whose sum is σ = 42214832604. Its totient is φ = 8040920480.

The previous prime is 20102301203. The next prime is 20102301251. The reversal of 20102301220 is 2210320102.

It can be written as a sum of positive squares in 2 ways, for example, as 2523253824 + 17579047396 = 50232^2 + 132586^2 .

It is a super-2 number, since 2×20102301220² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20102301220.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 502557511 + ... + 502557550.

It is an arithmetic number, because the mean of its divisors is an integer number (3517902717).

Almost surely, 2^20102301220 is an apocalyptic number.

20102301220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20102301220 is an abundant number, since it is smaller than the sum of its proper divisors (22112531384).

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

20102301220 is a wasteful number, since it uses less digits than its factorization.

20102301220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1005115070 (or 1005115068 counting only the distinct ones).

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

Adding to 20102301220 its reverse (2210320102), we get a palindrome (22312621322).

The spelling of 20102301220 in words is "twenty billion, one hundred two million, three hundred one thousand, two hundred twenty".