18023389313 has 2 divisors, whose sum is σ = 18023389314. Its totient is φ = 18023389312.

The previous prime is 18023389291. The next prime is 18023389399. The reversal of 18023389313 is 31398332081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16367875969 + 1655513344 = 127937^2 + 40688^2 .

It is a cyclic number.

It is not a de Polignac number, because 18023389313 - 2¹⁴ = 18023372929 is a prime.

It is a super-2 number, since 2×18023389313² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (18023389213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9011694656 + 9011694657.

It is an arithmetic number, because the mean of its divisors is an integer number (9011694657).

Almost surely, 2^18023389313 is an apocalyptic number.

It is an amenable number.

18023389313 is a deficient number, since it is larger than the sum of its proper divisors (1).

18023389313 is an equidigital number, since it uses as much as digits as its factorization.

18023389313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 41.

The spelling of 18023389313 in words is "eighteen billion, twenty-three million, three hundred eighty-nine thousand, three hundred thirteen".