18233920807 has 2 divisors, whose sum is σ = 18233920808. Its totient is φ = 18233920806.

The previous prime is 18233920729. The next prime is 18233920813. The reversal of 18233920807 is 70802933281.

It is a strong prime.

It is an emirp because it is prime and its reverse (70802933281) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18233920807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18233920847) 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 as a sum of consecutive naturals, namely, 9116960403 + 9116960404.

It is an arithmetic number, because the mean of its divisors is an integer number (9116960404).

Almost surely, 2^18233920807 is an apocalyptic number.

18233920807 is a deficient number, since it is larger than the sum of its proper divisors (1).

18233920807 is an equidigital number, since it uses as much as digits as its factorization.

18233920807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 43.

The spelling of 18233920807 in words is "eighteen billion, two hundred thirty-three million, nine hundred twenty thousand, eight hundred seven".