19400001 has 8 divisors (see below), whose sum is σ = 25940160. Its totient is φ = 12896592.

The previous prime is 19399999. The next prime is 19400023. The reversal of 19400001 is 10000491.

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

It is not a de Polignac number, because 19400001 - 2¹ = 19399999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19400071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7930 + ... + 10083.

It is an arithmetic number, because the mean of its divisors is an integer number (3242520).

Almost surely, 2^19400001 is an apocalyptic number.

It is an amenable number.

19400001 is a deficient number, since it is larger than the sum of its proper divisors (6540159).

19400001 is a wasteful number, since it uses less digits than its factorization.

19400001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18375.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 19400001 is about 4404.5432226282. The cubic root of 19400001 is about 268.6997428288.

Adding to 19400001 its reverse (10000491), we get a palindrome (29400492).

The spelling of 19400001 in words is "nineteen million, four hundred thousand, one".