20104000 has 112 divisors (see below), whose sum is σ = 57058560. Its totient is φ = 6873600.

The previous prime is 20103977. The next prime is 20104003. The reversal of 20104000 is 40102.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (7).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20104003) 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, 55821 + ... + 56179.

Almost surely, 2^20104000 is an apocalyptic number.

20104000 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 20104000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28529280).

20104000 is an abundant number, since it is smaller than the sum of its proper divisors (36954560).

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

20104000 is an equidigital number, since it uses as much as digits as its factorization.

20104000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393 (or 373 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 7.

The square root of 20104000 is about 4483.7484318369. The cubic root of 20104000 is about 271.9114475292.

Adding to 20104000 its reverse (40102), we get a palindrome (20144102).

The spelling of 20104000 in words is "twenty million, one hundred four thousand".