2118638023 has 2 divisors, whose sum is σ = 2118638024. Its totient is φ = 2118638022.

The previous prime is 2118638009. The next prime is 2118638033. The reversal of 2118638023 is 3208368112.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2118638023 - 2¹³ = 2118629831 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2118638023.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2118638033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1059319011 + 1059319012.

It is an arithmetic number, because the mean of its divisors is an integer number (1059319012).

Almost surely, 2^2118638023 is an apocalyptic number.

2118638023 is a deficient number, since it is larger than the sum of its proper divisors (1).

2118638023 is an equidigital number, since it uses as much as digits as its factorization.

2118638023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 2118638023 is about 46028.6652315706. The cubic root of 2118638023 is about 1284.3564983437.

The spelling of 2118638023 in words is "two billion, one hundred eighteen million, six hundred thirty-eight thousand, twenty-three".