19968506 has 16 divisors (see below), whose sum is σ = 33384960. Its totient is φ = 8902080.

The previous prime is 19968503. The next prime is 19968521. The reversal of 19968506 is 60586991.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (19968503) 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 7 ways as a sum of consecutive naturals, for example, 14810 + ... + 16101.

It is an arithmetic number, because the mean of its divisors is an integer number (2086560).

Almost surely, 2^19968506 is an apocalyptic number.

19968506 is a deficient number, since it is larger than the sum of its proper divisors (13416454).

19968506 is a wasteful number, since it uses less digits than its factorization.

19968506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30949.

The product of its (nonzero) digits is 116640, while the sum is 44.

The square root of 19968506 is about 4468.6134314796. The cubic root of 19968506 is about 271.2992070257.

The spelling of 19968506 in words is "nineteen million, nine hundred sixty-eight thousand, five hundred six".