25820993 has 8 divisors (see below), whose sum is σ = 28343136. Its totient is φ = 23328000.

The previous prime is 25820989. The next prime is 25821043. The reversal of 25820993 is 39902852.

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 25820993 - 2² = 25820989 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25820983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5408 + ... + 8993.

It is an arithmetic number, because the mean of its divisors is an integer number (3542892).

Almost surely, 2^25820993 is an apocalyptic number.

It is an amenable number.

25820993 is a deficient number, since it is larger than the sum of its proper divisors (2522143).

25820993 is a wasteful number, since it uses less digits than its factorization.

25820993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14575.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 25820993 is about 5081.4361159027. The cubic root of 25820993 is about 295.5681590899.

The spelling of 25820993 in words is "twenty-five million, eight hundred twenty thousand, nine hundred ninety-three".