18602157193861 has 2 divisors, whose sum is σ = 18602157193862. Its totient is φ = 18602157193860.

The previous prime is 18602157193799. The next prime is 18602157193891. The reversal of 18602157193861 is 16839175120681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14273964048100 + 4328193145761 = 3778090^2 + 2080431^2 .

It is a cyclic number.

It is not a de Polignac number, because 18602157193861 - 2¹⁹ = 18602156669573 is a prime.

It is a super-2 number, since 2×18602157193861² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18602157193796 and 18602157193805.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18602157193891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9301078596930 + 9301078596931.

It is an arithmetic number, because the mean of its divisors is an integer number (9301078596931).

Almost surely, 2^{18602157193861} is an apocalyptic number.

It is an amenable number.

18602157193861 is a deficient number, since it is larger than the sum of its proper divisors (1).

18602157193861 is an equidigital number, since it uses as much as digits as its factorization.

18602157193861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4354560, while the sum is 58.

The spelling of 18602157193861 in words is "eighteen trillion, six hundred two billion, one hundred fifty-seven million, one hundred ninety-three thousand, eight hundred sixty-one".