18670663 has 6 divisors (see below), whose sum is σ = 20522432. Its totient is φ = 16973220.

The previous prime is 18670661. The next prime is 18670667. The reversal of 18670663 is 36607681.

It is not a de Polignac number, because 18670663 - 2¹ = 18670661 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 polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 77031 + ... + 77272.

Almost surely, 2^18670663 is an apocalyptic number.

18670663 is a deficient number, since it is larger than the sum of its proper divisors (1851769).

18670663 is a wasteful number, since it uses less digits than its factorization.

18670663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154325 (or 154314 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 18670663 is about 4320.9562599036. The cubic root of 18670663 is about 265.2894096982.

The spelling of 18670663 in words is "eighteen million, six hundred seventy thousand, six hundred sixty-three".