18380677 has 4 divisors (see below), whose sum is σ = 21006496. Its totient is φ = 15754860.

The previous prime is 18380647. The next prime is 18380699. The reversal of 18380677 is 77608381.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18380677 - 2¹⁵ = 18347909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18380617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1312899 + ... + 1312912.

It is an arithmetic number, because the mean of its divisors is an integer number (5251624).

Almost surely, 2^18380677 is an apocalyptic number.

It is an amenable number.

18380677 is a deficient number, since it is larger than the sum of its proper divisors (2625819).

18380677 is an equidigital number, since it uses as much as digits as its factorization.

18380677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2625818.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 18380677 is about 4287.2691774602. The cubic root of 18380677 is about 263.9087772137.

The spelling of 18380677 in words is "eighteen million, three hundred eighty thousand, six hundred seventy-seven".