20004004123 has 8 divisors (see below), whose sum is σ = 20559753792. Its totient is φ = 19453676736.

The previous prime is 20004004117. The next prime is 20004004133. The reversal of 20004004123 is 32140040002.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20004004123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20004004097 and 20004004106.

It is not an unprimeable number, because it can be changed into a prime (20004004133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1348090 + ... + 1362847.

It is an arithmetic number, because the mean of its divisors is an integer number (2569969224).

Almost surely, 2^20004004123 is an apocalyptic number.

20004004123 is a deficient number, since it is larger than the sum of its proper divisors (555749669).

20004004123 is a wasteful number, since it uses less digits than its factorization.

20004004123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2711141.

The product of its (nonzero) digits is 192, while the sum is 16.

Adding to 20004004123 its reverse (32140040002), we get a palindrome (52144044125).

The spelling of 20004004123 in words is "twenty billion, four million, four thousand, one hundred twenty-three".