18799925487487 has 2 divisors, whose sum is σ = 18799925487488. Its totient is φ = 18799925487486.

The previous prime is 18799925487439. The next prime is 18799925487521. The reversal of 18799925487487 is 78478452999781.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18799925487487 - 2⁷ = 18799925487359 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18799925487398 and 18799925487407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18799905487487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9399962743743 + 9399962743744.

It is an arithmetic number, because the mean of its divisors is an integer number (9399962743744).

Almost surely, 2^{18799925487487} is an apocalyptic number.

18799925487487 is a deficient number, since it is larger than the sum of its proper divisors (1).

18799925487487 is an equidigital number, since it uses as much as digits as its factorization.

18799925487487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20483850240, while the sum is 88.

The spelling of 18799925487487 in words is "eighteen trillion, seven hundred ninety-nine billion, nine hundred twenty-five million, four hundred eighty-seven thousand, four hundred eighty-seven".