20200011220 has 24 divisors (see below), whose sum is σ = 42442702344. Its totient is φ = 8075684736.

The previous prime is 20200011203. The next prime is 20200011263. The reversal of 20200011220 is 2211000202.

It can be written as a sum of positive squares in 4 ways, for example, as 216796176 + 19983215044 = 14724^2 + 141362^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 20200011197 and 20200011206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 231507 + ... + 306586.

It is an arithmetic number, because the mean of its divisors is an integer number (1768445931).

Almost surely, 2^20200011220 is an apocalyptic number.

20200011220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20200011220 is an abundant number, since it is smaller than the sum of its proper divisors (22242691124).

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

20200011220 is a wasteful number, since it uses less digits than its factorization.

20200011220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539979 (or 539977 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 20200011220 its reverse (2211000202), we get a palindrome (22411011422).

The spelling of 20200011220 in words is "twenty billion, two hundred million, eleven thousand, two hundred twenty".