20011103220 has 48 divisors (see below), whose sum is σ = 56066226048. Its totient is φ = 5332947840.

The previous prime is 20011103209. The next prime is 20011103237. The reversal of 20011103220 is 2230111002.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 20011103196 and 20011103205.

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, 7351 + ... + 200190.

It is an arithmetic number, because the mean of its divisors is an integer number (1168046376).

Almost surely, 2^20011103220 is an apocalyptic number.

20011103220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20011103220 is an abundant number, since it is smaller than the sum of its proper divisors (36055122828).

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

20011103220 is a wasteful number, since it uses less digits than its factorization.

20011103220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209160 (or 209158 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 20011103220 its reverse (2230111002), we get a palindrome (22241214222).

The spelling of 20011103220 in words is "twenty billion, eleven million, one hundred three thousand, two hundred twenty".