19380641 has 4 divisors (see below), whose sum is σ = 22149312. Its totient is φ = 16611972.

The previous prime is 19380623. The next prime is 19380653. The reversal of 19380641 is 14608391.

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 a cyclic number.

It is not a de Polignac number, because 19380641 - 2¹⁰ = 19379617 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19380598 and 19380607.

It is not an unprimeable number, because it can be changed into a prime (19380601) 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, 1384325 + ... + 1384338.

It is an arithmetic number, because the mean of its divisors is an integer number (5537328).

Almost surely, 2^19380641 is an apocalyptic number.

It is an amenable number.

19380641 is a deficient number, since it is larger than the sum of its proper divisors (2768671).

19380641 is an equidigital number, since it uses as much as digits as its factorization.

19380641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2768670.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 19380641 is about 4402.3449433228. The cubic root of 19380641 is about 268.6103311767.

The spelling of 19380641 in words is "nineteen million, three hundred eighty thousand, six hundred forty-one".