18680671 has 12 divisors (see below), whose sum is σ = 20392168. Its totient is φ = 17096832.

The previous prime is 18680659. The next prime is 18680687. The reversal of 18680671 is 17608681.

It is not a de Polignac number, because 18680671 - 2⁹ = 18680159 is a prime.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18680671.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18680621) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9820 + ... + 11566.

Almost surely, 2^18680671 is an apocalyptic number.

18680671 is a deficient number, since it is larger than the sum of its proper divisors (1711497).

18680671 is a wasteful number, since it uses less digits than its factorization.

18680671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1818 (or 1801 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 18680671 is about 4322.1141817402. The cubic root of 18680671 is about 265.3368020907.

The spelling of 18680671 in words is "eighteen million, six hundred eighty thousand, six hundred seventy-one".