19328401 has 4 divisors (see below), whose sum is σ = 19600704. Its totient is φ = 19056100.

The previous prime is 19328389. The next prime is 19328417. The reversal of 19328401 is 10482391.

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, and also an emirpimes, since its reverse is a distinct semiprime: 10482391 = 263 ⋅39857.

It is a cyclic number.

It is not a de Polignac number, because 19328401 - 2¹⁹ = 18804113 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19328401.

It is not an unprimeable number, because it can be changed into a prime (19328431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136045 + ... + 136186.

It is an arithmetic number, because the mean of its divisors is an integer number (4900176).

Almost surely, 2^19328401 is an apocalyptic number.

It is an amenable number.

19328401 is a deficient number, since it is larger than the sum of its proper divisors (272303).

19328401 is an equidigital number, since it uses as much as digits as its factorization.

19328401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272302.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 19328401 is about 4396.4077381426. The cubic root of 19328401 is about 268.3687700157.

The spelling of 19328401 in words is "nineteen million, three hundred twenty-eight thousand, four hundred one".