20011080 has 64 divisors (see below), whose sum is σ = 61669440. Its totient is φ = 5190912.

The previous prime is 20011067. The next prime is 20011087. The reversal of 20011080 is 8011002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (20011087) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2187 + ... + 6693.

It is an arithmetic number, because the mean of its divisors is an integer number (963585).

Almost surely, 2^20011080 is an apocalyptic number.

20011080 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 20011080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30834720).

20011080 is an abundant number, since it is smaller than the sum of its proper divisors (41658360).

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

20011080 is a wasteful number, since it uses less digits than its factorization.

20011080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4558 (or 4554 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 20011080 is about 4473.3745651354. The cubic root of 20011080 is about 271.4918786510.

Adding to 20011080 its reverse (8011002), we get a palindrome (28022082).

It can be divided in two parts, 2001 and 1080, that added together give a triangular number (3081 = T₇₈).

The spelling of 20011080 in words is "twenty million, eleven thousand, eighty".