2918193918193 has 4 divisors (see below), whose sum is σ = 2935668133440. Its totient is φ = 2900719702948.

The previous prime is 2918193918187. The next prime is 2918193918203. The reversal of 2918193918193 is 3918193918192.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2918193918193 - 2¹⁷ = 2918193787121 is a prime.

It is a super-2 number, since 2×2918193918193² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2918193916193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8737107373 + ... + 8737107706.

It is an arithmetic number, because the mean of its divisors is an integer number (733917033360).

Almost surely, 2^{2918193918193} is an apocalyptic number.

It is an amenable number.

2918193918193 is a deficient number, since it is larger than the sum of its proper divisors (17474215247).

2918193918193 is a wasteful number, since it uses less digits than its factorization.

2918193918193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17474215246.

The product of its digits is 7558272, while the sum is 64.

Subtracting 2918193918193 from its reverse (3918193918192), we obtain a palindrome (999999999999).

The spelling of 2918193918193 in words is "two trillion, nine hundred eighteen billion, one hundred ninety-three million, nine hundred eighteen thousand, one hundred ninety-three".