25323502420 has 24 divisors (see below), whose sum is σ = 53411589000. Its totient is φ = 10085165952.

The previous prime is 25323502397. The next prime is 25323502489. The reversal of 25323502420 is 2420532352.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 13178580804 + 12144921616 = 114798^2 + 110204^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2759995 + ... + 2769154.

It is an arithmetic number, because the mean of its divisors is an integer number (2225482875).

Almost surely, 2^25323502420 is an apocalyptic number.

25323502420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25323502420 is an abundant number, since it is smaller than the sum of its proper divisors (28088086580).

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

25323502420 is a wasteful number, since it uses less digits than its factorization.

25323502420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5529387 (or 5529385 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 28.

The spelling of 25323502420 in words is "twenty-five billion, three hundred twenty-three million, five hundred two thousand, four hundred twenty".