19428541 has 4 divisors (see below), whose sum is σ = 21194784. Its totient is φ = 17662300.

The previous prime is 19428533. The next prime is 19428551. The reversal of 19428541 is 14582491.

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 19428541 - 2³ = 19428533 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19428497 and 19428506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19428551) 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, 883105 + ... + 883126.

It is an arithmetic number, because the mean of its divisors is an integer number (5298696).

Almost surely, 2^19428541 is an apocalyptic number.

19428541 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

19428541 is a deficient number, since it is larger than the sum of its proper divisors (1766243).

19428541 is a wasteful number, since it uses less digits than its factorization.

19428541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1766242.

The product of its digits is 11520, while the sum is 34.

The square root of 19428541 is about 4407.7818684685. The cubic root of 19428541 is about 268.8314427047.

The spelling of 19428541 in words is "nineteen million, four hundred twenty-eight thousand, five hundred forty-one".