18548130989 has 2 divisors, whose sum is σ = 18548130990. Its totient is φ = 18548130988.

The previous prime is 18548130983. The next prime is 18548131003. The reversal of 18548130989 is 98903184581.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10476546025 + 8071584964 = 102355^2 + 89842^2 .

It is a cyclic number.

It is not a de Polignac number, because 18548130989 - 2⁴ = 18548130973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18548130983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9274065494 + 9274065495.

It is an arithmetic number, because the mean of its divisors is an integer number (9274065495).

Almost surely, 2^18548130989 is an apocalyptic number.

It is an amenable number.

18548130989 is a deficient number, since it is larger than the sum of its proper divisors (1).

18548130989 is an equidigital number, since it uses as much as digits as its factorization.

18548130989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2488320, while the sum is 56.

The spelling of 18548130989 in words is "eighteen billion, five hundred forty-eight million, one hundred thirty thousand, nine hundred eighty-nine".