19859996 has 24 divisors (see below), whose sum is σ = 37549680. Its totient is φ = 9136512.

The previous prime is 19859981. The next prime is 19860007. The reversal of 19859996 is 69995891.

It is a super-2 number, since 2×19859996² = 788838882240032, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31775 + ... + 32393.

It is an arithmetic number, because the mean of its divisors is an integer number (1564570).

Almost surely, 2^19859996 is an apocalyptic number.

It is an amenable number.

19859996 is a deficient number, since it is larger than the sum of its proper divisors (17689684).

19859996 is a wasteful number, since it uses less digits than its factorization.

19859996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1253 (or 1251 counting only the distinct ones).

The product of its digits is 1574640, while the sum is 56.

The square root of 19859996 is about 4456.4555422443. The cubic root of 19859996 is about 270.8068957441.

The spelling of 19859996 in words is "nineteen million, eight hundred fifty-nine thousand, nine hundred ninety-six".