19998801 has 6 divisors (see below), whose sum is σ = 28887170. Its totient is φ = 13332528.

The previous prime is 19998779. The next prime is 19998809. The reversal of 19998801 is 10889991.

It can be written as a sum of positive squares in only one way, i.e., 15397776 + 4601025 = 3924^2 + 2145^2 .

It is not a de Polignac number, because 19998801 - 2¹³ = 19990609 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19998809) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1111036 + ... + 1111053.

Almost surely, 2^19998801 is an apocalyptic number.

It is an amenable number.

19998801 is a deficient number, since it is larger than the sum of its proper divisors (8888369).

19998801 is a wasteful number, since it uses less digits than its factorization.

19998801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2222095 (or 2222092 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 45.

The square root of 19998801 is about 4472.0019007152. The cubic root of 19998801 is about 271.4363372399.

The spelling of 19998801 in words is "nineteen million, nine hundred ninety-eight thousand, eight hundred one".