19041772394 has 8 divisors (see below), whose sum is σ = 28643573700. Its totient is φ = 9493914496.

The previous prime is 19041772361. The next prime is 19041772397. The reversal of 19041772394 is 49327714091.

It can be written as a sum of positive squares in 2 ways, for example, as 18158910025 + 882862369 = 134755^2 + 29713^2 .

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

It is not an unprimeable number, because it can be changed into a prime (19041772397) 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, 13484969 + ... + 13486380.

Almost surely, 2^19041772394 is an apocalyptic number.

19041772394 is a deficient number, since it is larger than the sum of its proper divisors (9601801306).

19041772394 is a wasteful number, since it uses less digits than its factorization.

19041772394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26971704.

The product of its (nonzero) digits is 381024, while the sum is 47.

The spelling of 19041772394 in words is "nineteen billion, forty-one million, seven hundred seventy-two thousand, three hundred ninety-four".