18642982 has 8 divisors (see below), whose sum is σ = 29609496. Its totient is φ = 8773152.

The previous prime is 18642979. The next prime is 18642983. The reversal of 18642982 is 28924681.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18642983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 274128 + ... + 274195.

It is an arithmetic number, because the mean of its divisors is an integer number (3701187).

Almost surely, 2^18642982 is an apocalyptic number.

18642982 is a deficient number, since it is larger than the sum of its proper divisors (10966514).

18642982 is a wasteful number, since it uses less digits than its factorization.

18642982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548342.

The product of its digits is 55296, while the sum is 40.

The square root of 18642982 is about 4317.7519613799. The cubic root of 18642982 is about 265.1582394184.

The spelling of 18642982 in words is "eighteen million, six hundred forty-two thousand, nine hundred eighty-two".