19400002 has 8 divisors (see below), whose sum is σ = 29719296. Its totient is φ = 9493572.

The previous prime is 19399999. The next prime is 19400023. The reversal of 19400002 is 20000491.

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 103098 + ... + 103285.

It is an arithmetic number, because the mean of its divisors is an integer number (3714912).

Almost surely, 2^19400002 is an apocalyptic number.

19400002 is a deficient number, since it is larger than the sum of its proper divisors (10319294).

19400002 is a wasteful number, since it uses less digits than its factorization.

19400002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206432.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 19400002 is about 4404.5433361473. The cubic root of 19400002 is about 268.6997474456.

Adding to 19400002 its reverse (20000491), we get a palindrome (39400493).

The spelling of 19400002 in words is "nineteen million, four hundred thousand, two".