20004123 has 8 divisors (see below), whose sum is σ = 27070528. Its totient is φ = 13136904.

The previous prime is 20004107. The next prime is 20004133. The reversal of 20004123 is 32140002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20004123 - 2⁴ = 20004107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20004099 and 20004108.

It is not an unprimeable number, because it can be changed into a prime (20004133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49561 + ... + 49962.

It is an arithmetic number, because the mean of its divisors is an integer number (3383816).

Almost surely, 2^20004123 is an apocalyptic number.

20004123 is a deficient number, since it is larger than the sum of its proper divisors (7066405).

20004123 is an equidigital number, since it uses as much as digits as its factorization.

20004123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99593.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 20004123 is about 4472.5968966586. The cubic root of 20004123 is about 271.4604129510.

Adding to 20004123 its reverse (32140002), we get a palindrome (52144125).

The spelling of 20004123 in words is "twenty million, four thousand, one hundred twenty-three".