25220323220 has 48 divisors (see below), whose sum is σ = 53775187200. Its totient is φ = 9933719040.

The previous prime is 25220323217. The next prime is 25220323229. The reversal of 25220323220 is 2232302252.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25220323229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1180796 + ... + 1201964.

It is an arithmetic number, because the mean of its divisors is an integer number (1120316400).

Almost surely, 2^25220323220 is an apocalyptic number.

25220323220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25220323220 is an abundant number, since it is smaller than the sum of its proper divisors (28554863980).

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

25220323220 is a wasteful number, since it uses less digits than its factorization.

25220323220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22088 (or 22086 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 23.

Adding to 25220323220 its reverse (2232302252), we get a palindrome (27452625472).

It can be divided in two parts, 2522032 and 3220, that added together give a palindrome (2525252).

The spelling of 25220323220 in words is "twenty-five billion, two hundred twenty million, three hundred twenty-three thousand, two hundred twenty".