2011000020 has 24 divisors (see below), whose sum is σ = 5630800224. Its totient is φ = 536266656.

The previous prime is 2011000007. The next prime is 2011000081. The reversal of 2011000020 is 200001102.

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 = 2010999972 and 2011000008.

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, 16758274 + ... + 16758393.

It is an arithmetic number, because the mean of its divisors is an integer number (234616676).

Almost surely, 2^2011000020 is an apocalyptic number.

2011000020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2011000020 is an abundant number, since it is smaller than the sum of its proper divisors (3619800204).

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

2011000020 is a wasteful number, since it uses less digits than its factorization.

2011000020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33516679 (or 33516677 counting only the distinct ones).

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

The square root of 2011000020 is about 44844.1748725517. The cubic root of 2011000020 is about 1262.2266874950.

Adding to 2011000020 its reverse (200001102), we get a palindrome (2211001122).

The spelling of 2011000020 in words is "two billion, eleven million, twenty", and thus it is an aban number and an uban number.