18418640950739 has 4 divisors (see below), whose sum is σ = 18693546039624. Its totient is φ = 18143735861856.

The previous prime is 18418640950687. The next prime is 18418640950777. The reversal of 18418640950739 is 93705904681481.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18418640950739 - 2⁸ = 18418640950483 is a prime.

It is a super-2 number, since 2×18418640950739² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18418640950789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137452544342 + ... + 137452544475.

It is an arithmetic number, because the mean of its divisors is an integer number (4673386509906).

Almost surely, 2^{18418640950739} is an apocalyptic number.

18418640950739 is a deficient number, since it is larger than the sum of its proper divisors (274905088885).

18418640950739 is an equidigital number, since it uses as much as digits as its factorization.

18418640950739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274905088884.

The product of its (nonzero) digits is 52254720, while the sum is 65.

The spelling of 18418640950739 in words is "eighteen trillion, four hundred eighteen billion, six hundred forty million, nine hundred fifty thousand, seven hundred thirty-nine".