19828361 has 4 divisors (see below), whose sum is σ = 22660992. Its totient is φ = 16995732.

The previous prime is 19828351. The next prime is 19828387. The reversal of 19828361 is 16382891.

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 19828361 - 2¹⁰ = 19827337 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 (19828331) 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, 1416305 + ... + 1416318.

It is an arithmetic number, because the mean of its divisors is an integer number (5665248).

Almost surely, 2^19828361 is an apocalyptic number.

It is an amenable number.

19828361 is a deficient number, since it is larger than the sum of its proper divisors (2832631).

19828361 is an equidigital number, since it uses as much as digits as its factorization.

19828361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2832630.

The product of its digits is 20736, while the sum is 38.

The square root of 19828361 is about 4452.9047822742. The cubic root of 19828361 is about 270.6630298381.

The spelling of 19828361 in words is "nineteen million, eight hundred twenty-eight thousand, three hundred sixty-one".