18670671 has 6 divisors (see below), whose sum is σ = 26968760. Its totient is φ = 12447108.

The previous prime is 18670669. The next prime is 18670721. The reversal of 18670671 is 17607681.

It is a happy number.

It is not a de Polignac number, because 18670671 - 2¹ = 18670669 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 (18670661) 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 5 ways as a sum of consecutive naturals, for example, 1037251 + ... + 1037268.

Almost surely, 2^18670671 is an apocalyptic number.

18670671 is a deficient number, since it is larger than the sum of its proper divisors (8298089).

18670671 is a wasteful number, since it uses less digits than its factorization.

18670671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2074525 (or 2074522 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 18670671 is about 4320.9571856245. The cubic root of 18670671 is about 265.2894475886.

The spelling of 18670671 in words is "eighteen million, six hundred seventy thousand, six hundred seventy-one".