25243820 has 36 divisors (see below), whose sum is σ = 61669440. Its totient is φ = 8654688.

The previous prime is 25243781. The next prime is 25243843. The reversal of 25243820 is 2834252.

It is a self number, because there is not a number n which added to its sum of digits gives 25243820.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11900 + ... + 13859.

It is an arithmetic number, because the mean of its divisors is an integer number (1713040).

Almost surely, 2^25243820 is an apocalyptic number.

25243820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25243820 is an abundant number, since it is smaller than the sum of its proper divisors (36425620).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25243820 is a wasteful number, since it uses less digits than its factorization.

25243820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25782 (or 25773 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 25243820 is about 5024.3228399457. The cubic root of 25243820 is about 293.3492788623.

The spelling of 25243820 in words is "twenty-five million, two hundred forty-three thousand, eight hundred twenty".