20110104 has 48 divisors (see below), whose sum is σ = 62247120. Its totient is φ = 5745600.

The previous prime is 20110087. The next prime is 20110109. The reversal of 20110104 is 40101102.

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 not an unprimeable number, because it can be changed into a prime (20110109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19447 + ... + 20454.

It is an arithmetic number, because the mean of its divisors is an integer number (1296815).

Almost surely, 2^20110104 is an apocalyptic number.

20110104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20110104 is an abundant number, since it is smaller than the sum of its proper divisors (42137016).

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

20110104 is a wasteful number, since it uses less digits than its factorization.

20110104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39920 (or 39913 counting only the distinct ones).

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

The square root of 20110104 is about 4484.4290606498. The cubic root of 20110104 is about 271.9389641018.

Adding to 20110104 its reverse (40101102), we get a palindrome (60211206).

The spelling of 20110104 in words is "twenty million, one hundred ten thousand, one hundred four".