19940899 has 16 divisors (see below), whose sum is σ = 23230080. Its totient is φ = 16925760.

The previous prime is 19940873. The next prime is 19940911. The reversal of 19940899 is 99804991.

It is a cyclic number.

It is not a de Polignac number, because 19940899 - 2¹¹ = 19938851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19940849) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14604 + ... + 15910.

It is an arithmetic number, because the mean of its divisors is an integer number (1451880).

Almost surely, 2^19940899 is an apocalyptic number.

19940899 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

19940899 is a deficient number, since it is larger than the sum of its proper divisors (3289181).

19940899 is a wasteful number, since it uses less digits than its factorization.

19940899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1410.

The product of its (nonzero) digits is 209952, while the sum is 49.

The square root of 19940899 is about 4465.5233735812. The cubic root of 19940899 is about 271.1741231985.

The spelling of 19940899 in words is "nineteen million, nine hundred forty thousand, eight hundred ninety-nine".