25324124520 has 128 divisors (see below), whose sum is σ = 77917593600. Its totient is φ = 6581412096.

The previous prime is 25324124513. The next prime is 25324124531. The reversal of 25324124520 is 2542142352.

It is a super-2 number, since 2×25324124520² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1338567 + ... + 1357353.

It is an arithmetic number, because the mean of its divisors is an integer number (608731200).

Almost surely, 2^25324124520 is an apocalyptic number.

25324124520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25324124520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38958796800).

25324124520 is an abundant number, since it is smaller than the sum of its proper divisors (52593469080).

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

25324124520 is a wasteful number, since it uses less digits than its factorization.

25324124520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19087 (or 19083 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 30.

Adding to 25324124520 its reverse (2542142352), we get a palindrome (27866266872).

The spelling of 25324124520 in words is "twenty-five billion, three hundred twenty-four million, one hundred twenty-four thousand, five hundred twenty".