18119215357 has 2 divisors, whose sum is σ = 18119215358. Its totient is φ = 18119215356.

The previous prime is 18119215339. The next prime is 18119215363. The reversal of 18119215357 is 75351291181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13490590201 + 4628625156 = 116149^2 + 68034^2 .

It is a cyclic number.

It is not a de Polignac number, because 18119215357 - 2¹⁵ = 18119182589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18119215307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9059607678 + 9059607679.

It is an arithmetic number, because the mean of its divisors is an integer number (9059607679).

Almost surely, 2^18119215357 is an apocalyptic number.

It is an amenable number.

18119215357 is a deficient number, since it is larger than the sum of its proper divisors (1).

18119215357 is an equidigital number, since it uses as much as digits as its factorization.

18119215357 is an evil number, because the sum of its binary digits is even.

The product of its digits is 75600, while the sum is 43.

The spelling of 18119215357 in words is "eighteen billion, one hundred nineteen million, two hundred fifteen thousand, three hundred fifty-seven".