20004010123 has 4 divisors (see below), whose sum is σ = 20008021528. Its totient is φ = 19999998720.

The previous prime is 20004010099. The next prime is 20004010127. The reversal of 20004010123 is 32101040002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20004010123 - 2⁹ = 20004009611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20004010127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1998213 + ... + 2008198.

It is an arithmetic number, because the mean of its divisors is an integer number (5002005382).

Almost surely, 2^20004010123 is an apocalyptic number.

20004010123 is a deficient number, since it is larger than the sum of its proper divisors (4011405).

20004010123 is an equidigital number, since it uses as much as digits as its factorization.

20004010123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4011404.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 20004010123 its reverse (32101040002), we get a palindrome (52105050125).

The spelling of 20004010123 in words is "twenty billion, four million, ten thousand, one hundred twenty-three".