19123982 has 4 divisors (see below), whose sum is σ = 28685976. Its totient is φ = 9561990.

The previous prime is 19123969. The next prime is 19123991. The reversal of 19123982 is 28932191.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 4780994 + ... + 4780997.

It is an arithmetic number, because the mean of its divisors is an integer number (7171494).

Almost surely, 2^19123982 is an apocalyptic number.

19123982 is a deficient number, since it is larger than the sum of its proper divisors (9561994).

19123982 is an equidigital number, since it uses as much as digits as its factorization.

19123982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9561993.

The product of its digits is 7776, while the sum is 35.

The square root of 19123982 is about 4373.0975292120. The cubic root of 19123982 is about 267.4193170942.

The spelling of 19123982 in words is "nineteen million, one hundred twenty-three thousand, nine hundred eighty-two".