18135411803 has 2 divisors, whose sum is σ = 18135411804. Its totient is φ = 18135411802.

The previous prime is 18135411781. The next prime is 18135411829. The reversal of 18135411803 is 30811453181.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18135411803 - 2⁶ = 18135411739 is a prime.

It is a super-2 number, since 2×18135411803² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (18135411883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9067705901 + 9067705902.

It is an arithmetic number, because the mean of its divisors is an integer number (9067705902).

Almost surely, 2^18135411803 is an apocalyptic number.

18135411803 is a deficient number, since it is larger than the sum of its proper divisors (1).

18135411803 is an equidigital number, since it uses as much as digits as its factorization.

18135411803 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 35.

Adding to 18135411803 its reverse (30811453181), we get a palindrome (48946864984).

The spelling of 18135411803 in words is "eighteen billion, one hundred thirty-five million, four hundred eleven thousand, eight hundred three".