18285828157 has 2 divisors, whose sum is σ = 18285828158. Its totient is φ = 18285828156.

The previous prime is 18285828139. The next prime is 18285828163. The reversal of 18285828157 is 75182858281.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15160011876 + 3125816281 = 123126^2 + 55909^2 .

It is a cyclic number.

It is not a de Polignac number, because 18285828157 - 2¹⁵ = 18285795389 is a prime.

It is a super-2 number, since 2×18285828157² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18285828098 and 18285828107.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18285828137) 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, 9142914078 + 9142914079.

It is an arithmetic number, because the mean of its divisors is an integer number (9142914079).

Almost surely, 2^18285828157 is an apocalyptic number.

It is an amenable number.

18285828157 is a deficient number, since it is larger than the sum of its proper divisors (1).

18285828157 is an equidigital number, since it uses as much as digits as its factorization.

18285828157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2867200, while the sum is 55.

The spelling of 18285828157 in words is "eighteen billion, two hundred eighty-five million, eight hundred twenty-eight thousand, one hundred fifty-seven".