18129025727 has 2 divisors, whose sum is σ = 18129025728. Its totient is φ = 18129025726.

The previous prime is 18129025699. The next prime is 18129025741. The reversal of 18129025727 is 72752092181.

It is a strong prime.

It is an emirp because it is prime and its reverse (72752092181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18129025727 - 2²⁰ = 18127977151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18129625727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9064512863 + 9064512864.

It is an arithmetic number, because the mean of its divisors is an integer number (9064512864).

Almost surely, 2^18129025727 is an apocalyptic number.

18129025727 is a deficient number, since it is larger than the sum of its proper divisors (1).

18129025727 is an equidigital number, since it uses as much as digits as its factorization.

18129025727 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 141120, while the sum is 44.

The spelling of 18129025727 in words is "eighteen billion, one hundred twenty-nine million, twenty-five thousand, seven hundred twenty-seven".