19394404 has 6 divisors (see below), whose sum is σ = 33940214. Its totient is φ = 9697200.

The previous prime is 19394387. The next prime is 19394407. The reversal of 19394404 is 40449391.

It can be written as a sum of positive squares in only one way, i.e., 18472804 + 921600 = 4298^2 + 960^2 .

It is a super-2 number, since 2×19394404² = 752285813030432, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19394404.

It is not an unprimeable number, because it can be changed into a prime (19394407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2424297 + ... + 2424304.

Almost surely, 2^19394404 is an apocalyptic number.

It is an amenable number.

19394404 is a deficient number, since it is larger than the sum of its proper divisors (14545810).

19394404 is a wasteful number, since it uses less digits than its factorization.

19394404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4848605 (or 4848603 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 19394404 is about 4403.9078101159. The cubic root of 19394404 is about 268.6738999244.

The spelling of 19394404 in words is "nineteen million, three hundred ninety-four thousand, four hundred four".