20400110023 has 4 divisors (see below), whose sum is σ = 20433718720. Its totient is φ = 20366501328.

The previous prime is 20400109997. The next prime is 20400110033. The reversal of 20400110023 is 32001100402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32001100402 = 2 ⋅16000550201.

It is a cyclic number.

It is not a de Polignac number, because 20400110023 - 2⁹ = 20400109511 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20400109985 and 20400110012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20400110033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16803438 + ... + 16804651.

It is an arithmetic number, because the mean of its divisors is an integer number (5108429680).

Almost surely, 2^20400110023 is an apocalyptic number.

20400110023 is a deficient number, since it is larger than the sum of its proper divisors (33608697).

20400110023 is an equidigital number, since it uses as much as digits as its factorization.

20400110023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33608696.

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

Adding to 20400110023 its reverse (32001100402), we get a palindrome (52401210425).

The spelling of 20400110023 in words is "twenty billion, four hundred million, one hundred ten thousand, twenty-three".