18377269793 has 2 divisors, whose sum is σ = 18377269794. Its totient is φ = 18377269792.

The previous prime is 18377269783. The next prime is 18377269817. The reversal of 18377269793 is 39796277381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18292021504 + 85248289 = 135248^2 + 9233^2 .

It is a cyclic number.

It is not a de Polignac number, because 18377269793 - 2¹⁶ = 18377204257 is a prime.

It is not a weakly prime, because it can be changed into another prime (18377269763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9188634896 + 9188634897.

It is an arithmetic number, because the mean of its divisors is an integer number (9188634897).

Almost surely, 2^18377269793 is an apocalyptic number.

It is an amenable number.

18377269793 is a deficient number, since it is larger than the sum of its proper divisors (1).

18377269793 is an equidigital number, since it uses as much as digits as its factorization.

18377269793 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24004512, while the sum is 62.

The spelling of 18377269793 in words is "eighteen billion, three hundred seventy-seven million, two hundred sixty-nine thousand, seven hundred ninety-three".