18070215157 has 2 divisors, whose sum is σ = 18070215158. Its totient is φ = 18070215156.

The previous prime is 18070215133. The next prime is 18070215169. The reversal of 18070215157 is 75151207081.

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., 16524074116 + 1546141041 = 128546^2 + 39321^2 .

It is a cyclic number.

It is not a de Polignac number, because 18070215157 - 2¹⁹ = 18069690869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18070215187) 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, 9035107578 + 9035107579.

It is an arithmetic number, because the mean of its divisors is an integer number (9035107579).

Almost surely, 2^18070215157 is an apocalyptic number.

It is an amenable number.

18070215157 is a deficient number, since it is larger than the sum of its proper divisors (1).

18070215157 is an equidigital number, since it uses as much as digits as its factorization.

18070215157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19600, while the sum is 37.

The spelling of 18070215157 in words is "eighteen billion, seventy million, two hundred fifteen thousand, one hundred fifty-seven".