19948899 has 4 divisors (see below), whose sum is σ = 26598536. Its totient is φ = 13299264.

The previous prime is 19948867. The next prime is 19948909. The reversal of 19948899 is 99884991.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 19948899 - 2⁵ = 19948867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19948849) 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 in 3 ways as a sum of consecutive naturals, for example, 3324814 + ... + 3324819.

It is an arithmetic number, because the mean of its divisors is an integer number (6649634).

Almost surely, 2^19948899 is an apocalyptic number.

19948899 is a deficient number, since it is larger than the sum of its proper divisors (6649637).

19948899 is an equidigital number, since it uses as much as digits as its factorization.

19948899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6649636.

The product of its digits is 1679616, while the sum is 57.

The square root of 19948899 is about 4466.4190354242. The cubic root of 19948899 is about 271.2103820609.

The spelling of 19948899 in words is "nineteen million, nine hundred forty-eight thousand, eight hundred ninety-nine".