25335021220 has 48 divisors (see below), whose sum is σ = 54723271680. Its totient is φ = 9846982656.

The previous prime is 25335021191. The next prime is 25335021223. The reversal of 25335021220 is 2212053352.

It is not an unprimeable number, because it can be changed into a prime (25335021223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89661 + ... + 242299.

It is an arithmetic number, because the mean of its divisors is an integer number (1140068160).

Almost surely, 2^25335021220 is an apocalyptic number.

25335021220 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 25335021220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27361635840).

25335021220 is an abundant number, since it is smaller than the sum of its proper divisors (29388250460).

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

25335021220 is a wasteful number, since it uses less digits than its factorization.

25335021220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152884 (or 152882 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 25.

Adding to 25335021220 its reverse (2212053352), we get a palindrome (27547074572).

The spelling of 25335021220 in words is "twenty-five billion, three hundred thirty-five million, twenty-one thousand, two hundred twenty".