19663049 has 4 divisors (see below), whose sum is σ = 22472064. Its totient is φ = 16854036.

The previous prime is 19663031. The next prime is 19663087. The reversal of 19663049 is 94036691.

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 a cyclic number.

It is not a de Polignac number, because 19663049 - 2⁸ = 19662793 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (19663019) 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, 1404497 + ... + 1404510.

It is an arithmetic number, because the mean of its divisors is an integer number (5618016).

Almost surely, 2^19663049 is an apocalyptic number.

It is an amenable number.

19663049 is a deficient number, since it is larger than the sum of its proper divisors (2809015).

19663049 is an equidigital number, since it uses as much as digits as its factorization.

19663049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2809014.

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 19663049 is about 4434.3036657405. The cubic root of 19663049 is about 269.9087437372.

The spelling of 19663049 in words is "nineteen million, six hundred sixty-three thousand, forty-nine".