18967982 has 8 divisors (see below), whose sum is σ = 31038552. Its totient is φ = 8621800.

The previous prime is 18967973. The next prime is 18967987. The reversal of 18967982 is 28976981.

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

It is a self number, because there is not a number n which added to its sum of digits gives 18967982.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18967987) 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 3 ways as a sum of consecutive naturals, for example, 431069 + ... + 431112.

It is an arithmetic number, because the mean of its divisors is an integer number (3879819).

Almost surely, 2^18967982 is an apocalyptic number.

18967982 is a deficient number, since it is larger than the sum of its proper divisors (12070570).

18967982 is a wasteful number, since it uses less digits than its factorization.

18967982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 862194.

The product of its digits is 435456, while the sum is 50.

The square root of 18967982 is about 4355.2246784753. The cubic root of 18967982 is about 266.6901913274.

The spelling of 18967982 in words is "eighteen million, nine hundred sixty-seven thousand, nine hundred eighty-two".