19400005 has 8 divisors (see below), whose sum is σ = 23560992. Its totient is φ = 15332688.

The previous prime is 19399999. The next prime is 19400023. The reversal of 19400005 is 50000491.

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

It is a cyclic number.

It is not a de Polignac number, because 19400005 - 2²¹ = 17302853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22959 + ... + 23788.

It is an arithmetic number, because the mean of its divisors is an integer number (2945124).

Almost surely, 2^19400005 is an apocalyptic number.

It is an amenable number.

19400005 is a deficient number, since it is larger than the sum of its proper divisors (4160987).

19400005 is an equidigital number, since it uses as much as digits as its factorization.

19400005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46835.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 19400005 is about 4404.5436767048. The cubic root of 19400005 is about 268.6997612961.

Adding to 19400005 its reverse (50000491), we get a palindrome (69400496).

The spelling of 19400005 in words is "nineteen million, four hundred thousand, five".