20011104 has 192 divisors, whose sum is σ = 65318400. Its totient is φ = 5930496.

The previous prime is 20011099. The next prime is 20011139. The reversal of 20011104 is 40111002.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 377542 + ... + 377594.

It is an arithmetic number, because the mean of its divisors is an integer number (340200).

Almost surely, 2^20011104 is an apocalyptic number.

20011104 is a gapful number since it is divisible by the number (24) 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 20011104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32659200).

20011104 is an abundant number, since it is smaller than the sum of its proper divisors (45307296).

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

20011104 is a wasteful number, since it uses less digits than its factorization.

20011104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114 (or 100 counting only the distinct ones).

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

The square root of 20011104 is about 4473.3772476732. The cubic root of 20011104 is about 271.4919871876.

Adding to 20011104 its reverse (40111002), we get a palindrome (60122106).

The spelling of 20011104 in words is "twenty million, eleven thousand, one hundred four".