19998896 has 20 divisors (see below), whose sum is σ = 38879952. Its totient is φ = 9965376.

The previous prime is 19998877. The next prime is 19998899. The reversal of 19998896 is 69889991.

It is not an unprimeable number, because it can be changed into a prime (19998899) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3101 + ... + 7043.

Almost surely, 2^19998896 is an apocalyptic number.

19998896 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

19998896 is a deficient number, since it is larger than the sum of its proper divisors (18881056).

19998896 is a wasteful number, since it uses less digits than its factorization.

19998896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4268 (or 4262 counting only the distinct ones).

The product of its digits is 2519424, while the sum is 59.

The square root of 19998896 is about 4472.0125223438. The cubic root of 19998896 is about 271.4367670392.

The spelling of 19998896 in words is "nineteen million, nine hundred ninety-eight thousand, eight hundred ninety-six".