18682971 has 4 divisors (see below), whose sum is σ = 24910632. Its totient is φ = 12455312.

The previous prime is 18682967. The next prime is 18682973. The reversal of 18682971 is 17928681.

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 18682971 - 2² = 18682967 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18682973) 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, 3113826 + ... + 3113831.

It is an arithmetic number, because the mean of its divisors is an integer number (6227658).

Almost surely, 2^18682971 is an apocalyptic number.

18682971 is a deficient number, since it is larger than the sum of its proper divisors (6227661).

18682971 is an equidigital number, since it uses as much as digits as its factorization.

18682971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6227660.

The product of its digits is 48384, while the sum is 42.

The square root of 18682971 is about 4322.3802470398. The cubic root of 18682971 is about 265.3476912356.

The spelling of 18682971 in words is "eighteen million, six hundred eighty-two thousand, nine hundred seventy-one".