19903982 has 16 divisors (see below), whose sum is σ = 35917440. Its totient is φ = 8081208.

The previous prime is 19903979. The next prime is 19903997. The reversal of 19903982 is 28930991.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37148 + ... + 37679.

It is an arithmetic number, because the mean of its divisors is an integer number (2244840).

Almost surely, 2^19903982 is an apocalyptic number.

19903982 is a deficient number, since it is larger than the sum of its proper divisors (16013458).

19903982 is a wasteful number, since it uses less digits than its factorization.

19903982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74855.

The product of its (nonzero) digits is 34992, while the sum is 41.

The square root of 19903982 is about 4461.3879006426. The cubic root of 19903982 is about 271.0066763967.

The spelling of 19903982 in words is "nineteen million, nine hundred three thousand, nine hundred eighty-two".