19424893 has 4 divisors (see below), whose sum is σ = 19437760. Its totient is φ = 19412028.

The previous prime is 19424869. The next prime is 19424953. The reversal of 19424893 is 39842491.

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 19424893 - 2⁹ = 19424381 is a prime.

It is a super-2 number, since 2×19424893² = 754652936122898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19424803) 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, 3813 + ... + 7306.

It is an arithmetic number, because the mean of its divisors is an integer number (4859440).

Almost surely, 2^19424893 is an apocalyptic number.

It is an amenable number.

19424893 is a deficient number, since it is larger than the sum of its proper divisors (12867).

19424893 is a wasteful number, since it uses less digits than its factorization.

19424893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12866.

The product of its digits is 62208, while the sum is 40.

The square root of 19424893 is about 4407.3680354606. The cubic root of 19424893 is about 268.8146159395.

The spelling of 19424893 in words is "nineteen million, four hundred twenty-four thousand, eight hundred ninety-three".