25804019 has 2 divisors, whose sum is σ = 25804020. Its totient is φ = 25804018.

The previous prime is 25804003. The next prime is 25804021. The reversal of 25804019 is 91040852.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25804019 - 2⁴ = 25804003 is a prime.

It is a super-2 number, since 2×25804019² = 1331694793104722, which contains 22 as substring.

Together with 25804021, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 25803982 and 25804000.

It is not a weakly prime, because it can be changed into another prime (25804039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12902009 + 12902010.

It is an arithmetic number, because the mean of its divisors is an integer number (12902010).

Almost surely, 2^25804019 is an apocalyptic number.

25804019 is a deficient number, since it is larger than the sum of its proper divisors (1).

25804019 is an equidigital number, since it uses as much as digits as its factorization.

25804019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 25804019 is about 5079.7656442005. The cubic root of 25804019 is about 295.5033788072.

The spelling of 25804019 in words is "twenty-five million, eight hundred four thousand, nineteen".