25820113 has 4 divisors (see below), whose sum is σ = 28167408. Its totient is φ = 23472820.

The previous prime is 25820101. The next prime is 25820129. The reversal of 25820113 is 31102852.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25820113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25826113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1173631 + ... + 1173652.

It is an arithmetic number, because the mean of its divisors is an integer number (7041852).

Almost surely, 2^25820113 is an apocalyptic number.

It is an amenable number.

25820113 is a deficient number, since it is larger than the sum of its proper divisors (2347295).

25820113 is a wasteful number, since it uses less digits than its factorization.

25820113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2347294.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 25820113 is about 5081.3495254706. The cubic root of 25820113 is about 295.5648013190.

Adding to 25820113 its reverse (31102852), we get a palindrome (56922965).

The spelling of 25820113 in words is "twenty-five million, eight hundred twenty thousand, one hundred thirteen".