20001104 has 10 divisors (see below), whose sum is σ = 38752170. Its totient is φ = 10000544.

The previous prime is 20001083. The next prime is 20001139. The reversal of 20001104 is 40110002.

It can be written as a sum of positive squares in only one way, i.e., 14047504 + 5953600 = 3748^2 + 2440^2 .

It is a super-2 number, since 2×20001104² = 800088322437632, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a junction number, because it is equal to n+sod(n) for n = 20001091 and 20001100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 625019 + ... + 625050.

It is an arithmetic number, because the mean of its divisors is an integer number (3875217).

Almost surely, 2^20001104 is an apocalyptic number.

It is an amenable number.

20001104 is a deficient number, since it is larger than the sum of its proper divisors (18751066).

20001104 is a wasteful number, since it uses less digits than its factorization.

20001104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1250077 (or 1250071 counting only the distinct ones).

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

The square root of 20001104 is about 4472.2593842486. The cubic root of 20001104 is about 271.4467560960.

Adding to 20001104 its reverse (40110002), we get a palindrome (60111106).

The spelling of 20001104 in words is "twenty million, one thousand, one hundred four".