19804007 has 2 divisors, whose sum is σ = 19804008. Its totient is φ = 19804006.

The previous prime is 19804003. The next prime is 19804021. The reversal of 19804007 is 70040891.

It is a weak prime.

It is an emirp because it is prime and its reverse (70040891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19804007 - 2² = 19804003 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19804003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9902003 + 9902004.

It is an arithmetic number, because the mean of its divisors is an integer number (9902004).

Almost surely, 2^19804007 is an apocalyptic number.

19804007 is a deficient number, since it is larger than the sum of its proper divisors (1).

19804007 is an equidigital number, since it uses as much as digits as its factorization.

19804007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 19804007 is about 4450.1693226213. The cubic root of 19804007 is about 270.5521713223.

Adding to 19804007 its reverse (70040891), we get a palindrome (89844898).

The spelling of 19804007 in words is "nineteen million, eight hundred four thousand, seven".