25120205340 has 48 divisors (see below), whose sum is σ = 70385293440. Its totient is φ = 6694081600.

The previous prime is 25120205321. The next prime is 25120205351. The reversal of 25120205340 is 4350202152.

It is a self number, because there is not a number n which added to its sum of digits gives 25120205340.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57210 + ... + 231329.

It is an arithmetic number, because the mean of its divisors is an integer number (1466360280).

Almost surely, 2^25120205340 is an apocalyptic number.

25120205340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25120205340 is an abundant number, since it is smaller than the sum of its proper divisors (45265088100).

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

25120205340 is a wasteful number, since it uses less digits than its factorization.

25120205340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290002 (or 290000 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

Adding to 25120205340 its reverse (4350202152), we get a palindrome (29470407492).

The spelling of 25120205340 in words is "twenty-five billion, one hundred twenty million, two hundred five thousand, three hundred forty".