20123004011 has 4 divisors (see below), whose sum is σ = 21952368024. Its totient is φ = 18293640000.

The previous prime is 20123003983. The next prime is 20123004019. The reversal of 20123004011 is 11040032102.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20123004011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20123004019) 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, 914681990 + ... + 914682011.

It is an arithmetic number, because the mean of its divisors is an integer number (5488092006).

Almost surely, 2^20123004011 is an apocalyptic number.

20123004011 is a deficient number, since it is larger than the sum of its proper divisors (1829364013).

20123004011 is a wasteful number, since it uses less digits than its factorization.

20123004011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1829364012.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 20123004011 its reverse (11040032102), we get a palindrome (31163036113).

The spelling of 20123004011 in words is "twenty billion, one hundred twenty-three million, four thousand, eleven".