18982097 has 4 divisors (see below), whose sum is σ = 19061760. Its totient is φ = 18902436.

The previous prime is 18982091. The next prime is 18982127. The reversal of 18982097 is 79028981.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18982097 - 2⁸ = 18981841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18982091) 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, 39473 + ... + 39950.

It is an arithmetic number, because the mean of its divisors is an integer number (4765440).

Almost surely, 2^18982097 is an apocalyptic number.

It is an amenable number.

18982097 is a deficient number, since it is larger than the sum of its proper divisors (79663).

18982097 is an equidigital number, since it uses as much as digits as its factorization.

18982097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79662.

The product of its (nonzero) digits is 72576, while the sum is 44.

The square root of 18982097 is about 4356.8448446095. The cubic root of 18982097 is about 266.7563273155.

The spelling of 18982097 in words is "eighteen million, nine hundred eighty-two thousand, ninety-seven".