20104730 has 16 divisors (see below), whose sum is σ = 36262944. Its totient is φ = 8025360.

The previous prime is 20104729. The next prime is 20104739. The reversal of 20104730 is 3740102.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20104699 and 20104708.

It is not an unprimeable number, because it can be changed into a prime (20104739) 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 7 ways as a sum of consecutive naturals, for example, 3845 + ... + 7415.

It is an arithmetic number, because the mean of its divisors is an integer number (2266434).

Almost surely, 2^20104730 is an apocalyptic number.

20104730 is a deficient number, since it is larger than the sum of its proper divisors (16158214).

20104730 is a wasteful number, since it uses less digits than its factorization.

20104730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4141.

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 20104730 is about 4483.8298362003. The cubic root of 20104730 is about 271.9147386314.

Adding to 20104730 its reverse (3740102), we get a palindrome (23844832).

The spelling of 20104730 in words is "twenty million, one hundred four thousand, seven hundred thirty".