25322450420 has 12 divisors (see below), whose sum is σ = 53177145924. Its totient is φ = 10128980160.

The previous prime is 25322450341. The next prime is 25322450423. The reversal of 25322450420 is 2405422352.

It can be written as a sum of positive squares in 2 ways, for example, as 14354915344 + 10967535076 = 119812^2 + 104726^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25322450423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 633061241 + ... + 633061280.

It is an arithmetic number, because the mean of its divisors is an integer number (4431428827).

Almost surely, 2^25322450420 is an apocalyptic number.

25322450420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25322450420 is an abundant number, since it is smaller than the sum of its proper divisors (27854695504).

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

25322450420 is a wasteful number, since it uses less digits than its factorization.

25322450420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1266122530 (or 1266122528 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 29.

Adding to 25322450420 its reverse (2405422352), we get a palindrome (27727872772).

The spelling of 25322450420 in words is "twenty-five billion, three hundred twenty-two million, four hundred fifty thousand, four hundred twenty".