18955982 has 8 divisors (see below), whose sum is σ = 28477656. Its totient is φ = 9463432.

The previous prime is 18955957. The next prime is 18955987. The reversal of 18955982 is 28955981.

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 (18955987) 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, 5573 + ... + 8304.

It is an arithmetic number, because the mean of its divisors is an integer number (3559707).

Almost surely, 2^18955982 is an apocalyptic number.

18955982 is a deficient number, since it is larger than the sum of its proper divisors (9521674).

18955982 is a wasteful number, since it uses less digits than its factorization.

18955982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14562.

The product of its digits is 259200, while the sum is 47.

The square root of 18955982 is about 4353.8468048382. The cubic root of 18955982 is about 266.6339393864.

Subtracting 18955982 from its reverse (28955981), we obtain a palindrome (9999999).

The spelling of 18955982 in words is "eighteen million, nine hundred fifty-five thousand, nine hundred eighty-two".