18975582389 has 2 divisors, whose sum is σ = 18975582390. Its totient is φ = 18975582388.

The previous prime is 18975582371. The next prime is 18975582433. The reversal of 18975582389 is 98328557981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18773658289 + 201924100 = 137017^2 + 14210^2 .

It is a cyclic number.

It is not a de Polignac number, because 18975582389 - 2⁸ = 18975582133 is a prime.

It is a super-4 number, since 4×18975582389⁴ (a number of 42 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18975582319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9487791194 + 9487791195.

It is an arithmetic number, because the mean of its divisors is an integer number (9487791195).

Almost surely, 2^18975582389 is an apocalyptic number.

It is an amenable number.

18975582389 is a deficient number, since it is larger than the sum of its proper divisors (1).

18975582389 is an equidigital number, since it uses as much as digits as its factorization.

18975582389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43545600, while the sum is 65.

The spelling of 18975582389 in words is "eighteen billion, nine hundred seventy-five million, five hundred eighty-two thousand, three hundred eighty-nine".