19424358409 has 4 divisors (see below), whose sum is σ = 19543526416. Its totient is φ = 19305190404.

The previous prime is 19424358403. The next prime is 19424358413. The reversal of 19424358409 is 90485342491.

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: 90485342491 = 47 ⋅1925220053.

It is a cyclic number.

It is not a de Polignac number, because 19424358409 - 2¹⁷ = 19424227337 is a prime.

It is a super-2 number, since 2×19424358409² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19424358403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59583759 + ... + 59584084.

It is an arithmetic number, because the mean of its divisors is an integer number (4885881604).

Almost surely, 2^19424358409 is an apocalyptic number.

It is an amenable number.

19424358409 is a deficient number, since it is larger than the sum of its proper divisors (119168007).

19424358409 is a wasteful number, since it uses less digits than its factorization.

19424358409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119168006.

The product of its (nonzero) digits is 1244160, while the sum is 49.

The spelling of 19424358409 in words is "nineteen billion, four hundred twenty-four million, three hundred fifty-eight thousand, four hundred nine".