25524431230420 has 12 divisors (see below), whose sum is σ = 53601305583924. Its totient is φ = 10209772492160.

The previous prime is 25524431230373. The next prime is 25524431230423. The reversal of 25524431230420 is 2403213442552.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 7212211029136 + 18312220201284 = 2685556^2 + 4279278^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 25524431230420.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25524431230423) 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, 638110780741 + ... + 638110780780.

It is an arithmetic number, because the mean of its divisors is an integer number (4466775465327).

Almost surely, 2^{25524431230420} is an apocalyptic number.

25524431230420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25524431230420 is an abundant number, since it is smaller than the sum of its proper divisors (28076874353504).

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

25524431230420 is a wasteful number, since it uses less digits than its factorization.

25524431230420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1276221561530 (or 1276221561528 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 37.

Adding to 25524431230420 its reverse (2403213442552), we get a palindrome (27927644672972).

The spelling of 25524431230420 in words is "twenty-five trillion, five hundred twenty-four billion, four hundred thirty-one million, two hundred thirty thousand, four hundred twenty".