19983982 has 8 divisors (see below), whose sum is σ = 29995056. Its totient is φ = 9985632.

The previous prime is 19983973. The next prime is 19983983. The reversal of 19983982 is 28938991.

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 (19983983) 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, 3903 + ... + 7429.

It is an arithmetic number, because the mean of its divisors is an integer number (3749382).

Almost surely, 2^19983982 is an apocalyptic number.

19983982 is a deficient number, since it is larger than the sum of its proper divisors (10011074).

19983982 is a wasteful number, since it uses less digits than its factorization.

19983982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6362.

The product of its digits is 279936, while the sum is 49.

The square root of 19983982 is about 4470.3447294364. The cubic root of 19983982 is about 271.3692764026.

The spelling of 19983982 in words is "nineteen million, nine hundred eighty-three thousand, nine hundred eighty-two".