20004004023 has 48 divisors (see below), whose sum is σ = 29941194240. Its totient is φ = 11844403200.

The previous prime is 20004004021. The next prime is 20004004037. The reversal of 20004004023 is 32040040002.

It is a happy number.

It is not a de Polignac number, because 20004004023 - 2¹ = 20004004021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20004003993 and 20004004011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20004004021) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4461943 + ... + 4466423.

It is an arithmetic number, because the mean of its divisors is an integer number (623774880).

Almost surely, 2^20004004023 is an apocalyptic number.

20004004023 is a deficient number, since it is larger than the sum of its proper divisors (9937190217).

20004004023 is a wasteful number, since it uses less digits than its factorization.

20004004023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4808 (or 4791 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 15.

Adding to 20004004023 its reverse (32040040002), we get a palindrome (52044044025).

The spelling of 20004004023 in words is "twenty billion, four million, four thousand, twenty-three".