18423158443 has 2 divisors, whose sum is σ = 18423158444. Its totient is φ = 18423158442.

The previous prime is 18423158399. The next prime is 18423158471. The reversal of 18423158443 is 34485132481.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18423158443 - 2⁹ = 18423157931 is a prime.

It is a super-3 number, since 3×18423158443³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18423158443.

It is not a weakly prime, because it can be changed into another prime (18423158473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9211579221 + 9211579222.

It is an arithmetic number, because the mean of its divisors is an integer number (9211579222).

Almost surely, 2^18423158443 is an apocalyptic number.

18423158443 is a deficient number, since it is larger than the sum of its proper divisors (1).

18423158443 is an equidigital number, since it uses as much as digits as its factorization.

18423158443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 368640, while the sum is 43.

The spelling of 18423158443 in words is "eighteen billion, four hundred twenty-three million, one hundred fifty-eight thousand, four hundred forty-three".