20433218023 has 2 divisors, whose sum is σ = 20433218024. Its totient is φ = 20433218022.

The previous prime is 20433218021. The next prime is 20433218063. The reversal of 20433218023 is 32081233402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20433218023 - 2¹ = 20433218021 is a prime.

Together with 20433218021, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 20433217982 and 20433218000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20433218021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10216609011 + 10216609012.

It is an arithmetic number, because the mean of its divisors is an integer number (10216609012).

Almost surely, 2^20433218023 is an apocalyptic number.

20433218023 is a deficient number, since it is larger than the sum of its proper divisors (1).

20433218023 is an equidigital number, since it uses as much as digits as its factorization.

20433218023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 28.

The spelling of 20433218023 in words is "twenty billion, four hundred thirty-three million, two hundred eighteen thousand, twenty-three".