20104788 has 48 divisors (see below), whose sum is σ = 51480576. Its totient is φ = 6056160.

The previous prime is 20104787. The next prime is 20104811. The reversal of 20104788 is 88740102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20104787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29095 + ... + 29777.

It is an arithmetic number, because the mean of its divisors is an integer number (1072512).

Almost surely, 2^20104788 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20104788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25740288).

20104788 is an abundant number, since it is smaller than the sum of its proper divisors (31375788).

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

20104788 is a wasteful number, since it uses less digits than its factorization.

20104788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 924 (or 922 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 20104788 is about 4483.8363038809. The cubic root of 20104788 is about 271.9150001128.

The spelling of 20104788 in words is "twenty million, one hundred four thousand, seven hundred eighty-eight".