18601151893 has 2 divisors, whose sum is σ = 18601151894. Its totient is φ = 18601151892.

The previous prime is 18601151869. The next prime is 18601151903. The reversal of 18601151893 is 39815110681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17715077604 + 886074289 = 133098^2 + 29767^2 .

It is an emirp because it is prime and its reverse (39815110681) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18601151893 - 2²⁹ = 18064280981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18601151993) 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, 9300575946 + 9300575947.

It is an arithmetic number, because the mean of its divisors is an integer number (9300575947).

Almost surely, 2^18601151893 is an apocalyptic number.

It is an amenable number.

18601151893 is a deficient number, since it is larger than the sum of its proper divisors (1).

18601151893 is an equidigital number, since it uses as much as digits as its factorization.

18601151893 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 43.

The spelling of 18601151893 in words is "eighteen billion, six hundred one million, one hundred fifty-one thousand, eight hundred ninety-three".