18196739513 has 2 divisors, whose sum is σ = 18196739514. Its totient is φ = 18196739512.

The previous prime is 18196739479. The next prime is 18196739521. The reversal of 18196739513 is 31593769181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9360175504 + 8836564009 = 96748^2 + 94003^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18196739513 is a prime.

It is a super-2 number, since 2×18196739513² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18196739543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9098369756 + 9098369757.

It is an arithmetic number, because the mean of its divisors is an integer number (9098369757).

Almost surely, 2^18196739513 is an apocalyptic number.

It is an amenable number.

18196739513 is a deficient number, since it is larger than the sum of its proper divisors (1).

18196739513 is an equidigital number, since it uses as much as digits as its factorization.

18196739513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1224720, while the sum is 53.

The spelling of 18196739513 in words is "eighteen billion, one hundred ninety-six million, seven hundred thirty-nine thousand, five hundred thirteen".