18316806733 has 2 divisors, whose sum is σ = 18316806734. Its totient is φ = 18316806732.

The previous prime is 18316806671. The next prime is 18316806737. The reversal of 18316806733 is 33760861381.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14222470564 + 4094336169 = 119258^2 + 63987^2 .

It is a cyclic number.

It is not a de Polignac number, because 18316806733 - 2¹⁷ = 18316675661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18316806737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9158403366 + 9158403367.

It is an arithmetic number, because the mean of its divisors is an integer number (9158403367).

Almost surely, 2^18316806733 is an apocalyptic number.

It is an amenable number.

18316806733 is a deficient number, since it is larger than the sum of its proper divisors (1).

18316806733 is an equidigital number, since it uses as much as digits as its factorization.

18316806733 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 435456, while the sum is 46.

The spelling of 18316806733 in words is "eighteen billion, three hundred sixteen million, eight hundred six thousand, seven hundred thirty-three".