20010011220 has 72 divisors (see below), whose sum is σ = 60716292000. Its totient is φ = 5334310080.

The previous prime is 20010011209. The next prime is 20010011221. The reversal of 20010011220 is 2211001002.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20010011221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 613935 + ... + 645705.

Almost surely, 2^20010011220 is an apocalyptic number.

20010011220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20010011220 is an abundant number, since it is smaller than the sum of its proper divisors (40706280780).

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

20010011220 is a wasteful number, since it uses less digits than its factorization.

20010011220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35285 (or 35280 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 20010011220 its reverse (2211001002), we get a palindrome (22221012222).

The spelling of 20010011220 in words is "twenty billion, ten million, eleven thousand, two hundred twenty".