19223843494 has 8 divisors (see below), whose sum is σ = 28841134248. Its totient is φ = 9610132080.

The previous prime is 19223843477. The next prime is 19223843497. The reversal of 19223843494 is 49434832291.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×19223843494² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19223843497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 881367 + ... + 902914.

It is an arithmetic number, because the mean of its divisors is an integer number (3605141781).

Almost surely, 2^19223843494 is an apocalyptic number.

19223843494 is a deficient number, since it is larger than the sum of its proper divisors (9617290754).

19223843494 is a wasteful number, since it uses less digits than its factorization.

19223843494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1789670.

The product of its digits is 1492992, while the sum is 49.

The spelling of 19223843494 in words is "nineteen billion, two hundred twenty-three million, eight hundred forty-three thousand, four hundred ninety-four".