18133812371 has 2 divisors, whose sum is σ = 18133812372. Its totient is φ = 18133812370.

The previous prime is 18133812349. The next prime is 18133812407. The reversal of 18133812371 is 17321833181.

It is a weak prime.

It is an emirp because it is prime and its reverse (17321833181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18133812371 - 2¹⁰ = 18133811347 is a prime.

It is a super-2 number, since 2×18133812371² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18133812311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9066906185 + 9066906186.

It is an arithmetic number, because the mean of its divisors is an integer number (9066906186).

Almost surely, 2^18133812371 is an apocalyptic number.

18133812371 is a deficient number, since it is larger than the sum of its proper divisors (1).

18133812371 is an equidigital number, since it uses as much as digits as its factorization.

18133812371 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 38.

The spelling of 18133812371 in words is "eighteen billion, one hundred thirty-three million, eight hundred twelve thousand, three hundred seventy-one".