18574454489 has 2 divisors, whose sum is σ = 18574454490. Its totient is φ = 18574454488.

The previous prime is 18574454443. The next prime is 18574454551. The reversal of 18574454489 is 98445447581.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18540907225 + 33547264 = 136165^2 + 5792^2 .

It is a cyclic number.

It is not a de Polignac number, because 18574454489 - 2²⁴ = 18557677273 is a prime.

It is a super-2 number, since 2×18574454489² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18574454429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9287227244 + 9287227245.

It is an arithmetic number, because the mean of its divisors is an integer number (9287227245).

Almost surely, 2^18574454489 is an apocalyptic number.

It is an amenable number.

18574454489 is a deficient number, since it is larger than the sum of its proper divisors (1).

18574454489 is an equidigital number, since it uses as much as digits as its factorization.

18574454489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25804800, while the sum is 59.

The spelling of 18574454489 in words is "eighteen billion, five hundred seventy-four million, four hundred fifty-four thousand, four hundred eighty-nine".