18381107527 has 2 divisors, whose sum is σ = 18381107528. Its totient is φ = 18381107526.

The previous prime is 18381107519. The next prime is 18381107587. The reversal of 18381107527 is 72570118381.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18381107527 - 2³ = 18381107519 is a prime.

It is a super-2 number, since 2×18381107527² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18381107587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9190553763 + 9190553764.

It is an arithmetic number, because the mean of its divisors is an integer number (9190553764).

Almost surely, 2^18381107527 is an apocalyptic number.

18381107527 is a deficient number, since it is larger than the sum of its proper divisors (1).

18381107527 is an equidigital number, since it uses as much as digits as its factorization.

18381107527 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 94080, while the sum is 43.

The spelling of 18381107527 in words is "eighteen billion, three hundred eighty-one million, one hundred seven thousand, five hundred twenty-seven".