20104470 has 64 divisors (see below), whose sum is σ = 56448000. Its totient is φ = 5077728.

The previous prime is 20104433. The next prime is 20104493. The reversal of 20104470 is 7440102.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 3171 + ... + 7089.

It is an arithmetic number, because the mean of its divisors is an integer number (882000).

Almost surely, 2^20104470 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20104470, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28224000).

20104470 is an abundant number, since it is smaller than the sum of its proper divisors (36343530).

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

20104470 is a wasteful number, since it uses less digits than its factorization.

20104470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3954 (or 3948 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 20104470 is about 4483.8008430348. The cubic root of 20104470 is about 271.9135664671.

Adding to 20104470 its reverse (7440102), we get a palindrome (27544572).

The spelling of 20104470 in words is "twenty million, one hundred four thousand, four hundred seventy".