2118618793 has 2 divisors, whose sum is σ = 2118618794. Its totient is φ = 2118618792.

The previous prime is 2118618781. The next prime is 2118618823. The reversal of 2118618793 is 3978168112.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1183910464 + 934708329 = 34408^2 + 30573^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2118618793 is a prime.

It is not a weakly prime, because it can be changed into another prime (2118618703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1059309396 + 1059309397.

It is an arithmetic number, because the mean of its divisors is an integer number (1059309397).

Almost surely, 2^2118618793 is an apocalyptic number.

It is an amenable number.

2118618793 is a deficient number, since it is larger than the sum of its proper divisors (1).

2118618793 is an equidigital number, since it uses as much as digits as its factorization.

2118618793 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 46.

The square root of 2118618793 is about 46028.4563395298. The cubic root of 2118618793 is about 1284.3526124746.

The spelling of 2118618793 in words is "two billion, one hundred eighteen million, six hundred eighteen thousand, seven hundred ninety-three".