20123104011 has 32 divisors (see below), whose sum is σ = 27541451520. Its totient is φ = 13064937600.

The previous prime is 20123103991. The next prime is 20123104039. The reversal of 20123104011 is 11040132102.

It is not a de Polignac number, because 20123104011 - 2⁶ = 20123103947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20123104061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16372945 + ... + 16374173.

It is an arithmetic number, because the mean of its divisors is an integer number (860670360).

Almost surely, 2^20123104011 is an apocalyptic number.

20123104011 is a deficient number, since it is larger than the sum of its proper divisors (7418347509).

20123104011 is a wasteful number, since it uses less digits than its factorization.

20123104011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2107.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 20123104011 its reverse (11040132102), we get a palindrome (31163236113).

The spelling of 20123104011 in words is "twenty billion, one hundred twenty-three million, one hundred four thousand, eleven".