19868956 has 24 divisors (see below), whose sum is σ = 35420000. Its totient is φ = 9751104.

The previous prime is 19868939. The next prime is 19868957. The reversal of 19868956 is 65986891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19868957) 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, 86650 + ... + 86878.

Almost surely, 2^19868956 is an apocalyptic number.

It is an amenable number.

19868956 is a deficient number, since it is larger than the sum of its proper divisors (15551044).

19868956 is a wasteful number, since it uses less digits than its factorization.

19868956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541 (or 539 counting only the distinct ones).

The product of its digits is 933120, while the sum is 52.

The square root of 19868956 is about 4457.4607121095. The cubic root of 19868956 is about 270.8476152048.

The spelling of 19868956 in words is "nineteen million, eight hundred sixty-eight thousand, nine hundred fifty-six".