20111303220 has 48 divisors (see below), whose sum is σ = 56433350400. Its totient is φ = 5351423616.

The previous prime is 20111303209. The next prime is 20111303323. The reversal of 20111303220 is 2230311102.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20111303220.

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, 334195 + ... + 389754.

It is an arithmetic number, because the mean of its divisors is an integer number (1175694800).

Almost surely, 2^20111303220 is an apocalyptic number.

20111303220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20111303220 is an abundant number, since it is smaller than the sum of its proper divisors (36322047180).

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

20111303220 is a wasteful number, since it uses less digits than its factorization.

20111303220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 724424 (or 724422 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 20111303220 its reverse (2230311102), we get a palindrome (22341614322).

The spelling of 20111303220 in words is "twenty billion, one hundred eleven million, three hundred three thousand, two hundred twenty".