18844458623 has 2 divisors, whose sum is σ = 18844458624. Its totient is φ = 18844458622.

The previous prime is 18844458583. The next prime is 18844458649. The reversal of 18844458623 is 32685444881.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18844458623 - 2³⁴ = 1664589439 is a prime.

It is a super-2 number, since 2×18844458623² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18844458683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9422229311 + 9422229312.

It is an arithmetic number, because the mean of its divisors is an integer number (9422229312).

Almost surely, 2^18844458623 is an apocalyptic number.

18844458623 is a deficient number, since it is larger than the sum of its proper divisors (1).

18844458623 is an equidigital number, since it uses as much as digits as its factorization.

18844458623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5898240, while the sum is 53.

The spelling of 18844458623 in words is "eighteen billion, eight hundred forty-four million, four hundred fifty-eight thousand, six hundred twenty-three".