19868936 has 8 divisors (see below), whose sum is σ = 37254270. Its totient is φ = 9934464.

The previous prime is 19868897. The next prime is 19868939. The reversal of 19868936 is 63986891.

It can be written as a sum of positive squares in only one way, i.e., 19624900 + 244036 = 4430^2 + 494^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (19868939) by changing a digit.

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 as a sum of consecutive naturals, namely, 1241801 + ... + 1241816.

Almost surely, 2^19868936 is an apocalyptic number.

It is an amenable number.

19868936 is a deficient number, since it is larger than the sum of its proper divisors (17385334).

19868936 is a wasteful number, since it uses less digits than its factorization.

19868936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2483623 (or 2483619 counting only the distinct ones).

The product of its digits is 559872, while the sum is 50.

The square root of 19868936 is about 4457.4584686792. The cubic root of 19868936 is about 270.8475243268.

The spelling of 19868936 in words is "nineteen million, eight hundred sixty-eight thousand, nine hundred thirty-six".