18620671 has 4 divisors (see below), whose sum is σ = 18739432. Its totient is φ = 18501912.

The previous prime is 18620659. The next prime is 18620687. The reversal of 18620671 is 17602681.

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

It is a cyclic number.

It is not a de Polignac number, because 18620671 - 2⁹ = 18620159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18621671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59145 + ... + 59458.

It is an arithmetic number, because the mean of its divisors is an integer number (4684858).

Almost surely, 2^18620671 is an apocalyptic number.

18620671 is a deficient number, since it is larger than the sum of its proper divisors (118761).

18620671 is a wasteful number, since it uses less digits than its factorization.

18620671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118760.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 18620671 is about 4315.1675517875. The cubic root of 18620671 is about 265.0524210999.

It can be divided in two parts, 18620 and 671, that added together give a palindrome (19291).

The spelling of 18620671 in words is "eighteen million, six hundred twenty thousand, six hundred seventy-one".