19948449 has 4 divisors (see below), whose sum is σ = 26597936. Its totient is φ = 13298964.

The previous prime is 19948441. The next prime is 19948451. The reversal of 19948449 is 94484991.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 19948449 - 2³ = 19948441 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19948398 and 19948407.

It is not an unprimeable number, because it can be changed into a prime (19948441) 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, 3324739 + ... + 3324744.

It is an arithmetic number, because the mean of its divisors is an integer number (6649484).

Almost surely, 2^19948449 is an apocalyptic number.

It is an amenable number.

19948449 is a deficient number, since it is larger than the sum of its proper divisors (6649487).

19948449 is an equidigital number, since it uses as much as digits as its factorization.

19948449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6649486.

The product of its digits is 373248, while the sum is 48.

The square root of 19948449 is about 4466.3686592130. The cubic root of 19948449 is about 271.2083427573.

The spelling of 19948449 in words is "nineteen million, nine hundred forty-eight thousand, four hundred forty-nine".