25633993 has 16 divisors (see below), whose sum is σ = 32993280. Its totient is φ = 19328400.

The previous prime is 25633973. The next prime is 25633997. The reversal of 25633993 is 39933652.

It is a de Polignac number, because none of the positive numbers 2^k-25633993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25633997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2983 + ... + 7756.

It is an arithmetic number, because the mean of its divisors is an integer number (2062080).

Almost surely, 2^25633993 is an apocalyptic number.

It is an amenable number.

25633993 is a deficient number, since it is larger than the sum of its proper divisors (7359287).

25633993 is a wasteful number, since it uses less digits than its factorization.

25633993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10788.

The product of its digits is 131220, while the sum is 40.

The square root of 25633993 is about 5063.0023701357. The cubic root of 25633993 is about 294.8529114476.

It can be divided in two parts, 2563 and 3993, that added together give a palindrome (6556).

The spelling of 25633993 in words is "twenty-five million, six hundred thirty-three thousand, nine hundred ninety-three".