19828229 has 4 divisors (see below), whose sum is σ = 20871840. Its totient is φ = 18784620.

The previous prime is 19828217. The next prime is 19828253. The reversal of 19828229 is 92282891.

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 19828229 - 2²⁰ = 18779653 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19828429) 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, 521777 + ... + 521814.

It is an arithmetic number, because the mean of its divisors is an integer number (5217960).

Almost surely, 2^19828229 is an apocalyptic number.

19828229 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

19828229 is a deficient number, since it is larger than the sum of its proper divisors (1043611).

19828229 is a wasteful number, since it uses less digits than its factorization.

19828229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1043610.

The product of its digits is 41472, while the sum is 41.

The square root of 19828229 is about 4452.8899604639. The cubic root of 19828229 is about 270.6624292236.

The spelling of 19828229 in words is "nineteen million, eight hundred twenty-eight thousand, two hundred twenty-nine".