18485377 has 4 divisors (see below), whose sum is σ = 18504916. Its totient is φ = 18465840.

The previous prime is 18485371. The next prime is 18485381. The reversal of 18485377 is 77358481.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12609601 + 5875776 = 3551^2 + 2424^2 .

It is a cyclic number.

It is not a de Polignac number, because 18485377 - 2⁷ = 18485249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18485371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8274 + ... + 10267.

It is an arithmetic number, because the mean of its divisors is an integer number (4626229).

Almost surely, 2^18485377 is an apocalyptic number.

It is an amenable number.

18485377 is a deficient number, since it is larger than the sum of its proper divisors (19539).

18485377 is an equidigital number, since it uses as much as digits as its factorization.

18485377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19538.

The product of its digits is 188160, while the sum is 43.

The square root of 18485377 is about 4299.4624082552. The cubic root of 18485377 is about 264.4089211058.

It can be divided in two parts, 1848 and 5377, that added together give a square (7225 = 85²).

The spelling of 18485377 in words is "eighteen million, four hundred eighty-five thousand, three hundred seventy-seven".