18157300489 has 2 divisors, whose sum is σ = 18157300490. Its totient is φ = 18157300488.

The previous prime is 18157300477. The next prime is 18157300493. The reversal of 18157300489 is 98400375181.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10829940489 + 7327360000 = 104067^2 + 85600^2 .

It is a cyclic number.

It is not a de Polignac number, because 18157300489 - 2⁹ = 18157299977 is a prime.

It is a super-2 number, since 2×18157300489² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18157300409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9078650244 + 9078650245.

It is an arithmetic number, because the mean of its divisors is an integer number (9078650245).

Almost surely, 2^18157300489 is an apocalyptic number.

It is an amenable number.

18157300489 is a deficient number, since it is larger than the sum of its proper divisors (1).

18157300489 is an equidigital number, since it uses as much as digits as its factorization.

18157300489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 241920, while the sum is 46.

The spelling of 18157300489 in words is "eighteen billion, one hundred fifty-seven million, three hundred thousand, four hundred eighty-nine".