20110000020 has 96 divisors (see below), whose sum is σ = 61485613056. Its totient is φ = 4870492800.

The previous prime is 20110000003. The next prime is 20110000061. The reversal of 20110000020 is 2000001102.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (6).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a junction number, because it is equal to n+sod(n) for n = 20109999963 and 20110000008.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 703405 + ... + 731435.

It is an arithmetic number, because the mean of its divisors is an integer number (640475136).

Almost surely, 2^20110000020 is an apocalyptic number.

20110000020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20110000020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30742806528).

20110000020 is an abundant number, since it is smaller than the sum of its proper divisors (41375613036).

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

20110000020 is a wasteful number, since it uses less digits than its factorization.

20110000020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29141 (or 29139 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 6.

Adding to 20110000020 its reverse (2000001102), we get a palindrome (22110001122).

The spelling of 20110000020 in words is "twenty billion, one hundred ten million, twenty", and thus it is an aban number.