19446412394 has 8 divisors (see below), whose sum is σ = 29242361988. Its totient is φ = 9698958400.

The previous prime is 19446412379. The next prime is 19446412397. The reversal of 19446412394 is 49321464491.

It can be written as a sum of positive squares in 2 ways, for example, as 17348314369 + 2098098025 = 131713^2 + 45805^2 .

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

It is a super-2 number, since 2×19446412394² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19446412397) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12122897 + ... + 12124500.

Almost surely, 2^19446412394 is an apocalyptic number.

19446412394 is a deficient number, since it is larger than the sum of its proper divisors (9795949594).

19446412394 is a wasteful number, since it uses less digits than its factorization.

19446412394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24247800.

The product of its digits is 746496, while the sum is 47.

The spelling of 19446412394 in words is "nineteen billion, four hundred forty-six million, four hundred twelve thousand, three hundred ninety-four".