18013500811 has 2 divisors, whose sum is σ = 18013500812. Its totient is φ = 18013500810.

The previous prime is 18013500787. The next prime is 18013500821. The reversal of 18013500811 is 11800531081.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18013500811 - 2⁷ = 18013500683 is a prime.

It is a super-2 number, since 2×18013500811² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18013500811.

It is not a weakly prime, because it can be changed into another prime (18013500821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9006750405 + 9006750406.

It is an arithmetic number, because the mean of its divisors is an integer number (9006750406).

Almost surely, 2^18013500811 is an apocalyptic number.

18013500811 is a deficient number, since it is larger than the sum of its proper divisors (1).

18013500811 is an equidigital number, since it uses as much as digits as its factorization.

18013500811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 28.

The spelling of 18013500811 in words is "eighteen billion, thirteen million, five hundred thousand, eight hundred eleven".