18606156143 has 2 divisors, whose sum is σ = 18606156144. Its totient is φ = 18606156142.

The previous prime is 18606156131. The next prime is 18606156187. The reversal of 18606156143 is 34165160681.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18606156143 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18606156143.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18606156113) 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, 9303078071 + 9303078072.

It is an arithmetic number, because the mean of its divisors is an integer number (9303078072).

Almost surely, 2^18606156143 is an apocalyptic number.

18606156143 is a deficient number, since it is larger than the sum of its proper divisors (1).

18606156143 is an equidigital number, since it uses as much as digits as its factorization.

18606156143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 41.

The spelling of 18606156143 in words is "eighteen billion, six hundred six million, one hundred fifty-six thousand, one hundred forty-three".