18091046377 has 2 divisors, whose sum is σ = 18091046378. Its totient is φ = 18091046376.

The previous prime is 18091046357. The next prime is 18091046411. The reversal of 18091046377 is 77364019081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18001857241 + 89189136 = 134171^2 + 9444^2 .

It is a cyclic number.

It is not a de Polignac number, because 18091046377 - 2²⁷ = 17956828649 is a prime.

It is a super-2 number, since 2×18091046377² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18091046357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9045523188 + 9045523189.

It is an arithmetic number, because the mean of its divisors is an integer number (9045523189).

Almost surely, 2^18091046377 is an apocalyptic number.

It is an amenable number.

18091046377 is a deficient number, since it is larger than the sum of its proper divisors (1).

18091046377 is an equidigital number, since it uses as much as digits as its factorization.

18091046377 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 254016, while the sum is 46.

The spelling of 18091046377 in words is "eighteen billion, ninety-one million, forty-six thousand, three hundred seventy-seven".