25105052220 has 96 divisors (see below), whose sum is σ = 71483005440. Its totient is φ = 6582401280.

The previous prime is 25105052197. The next prime is 25105052237. The reversal of 25105052220 is 2225050152.

It is a congruent number.

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, 842089 + ... + 871391.

It is an arithmetic number, because the mean of its divisors is an integer number (744614640).

Almost surely, 2^25105052220 is an apocalyptic number.

25105052220 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 25105052220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35741502720).

25105052220 is an abundant number, since it is smaller than the sum of its proper divisors (46377953220).

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

25105052220 is a wasteful number, since it uses less digits than its factorization.

25105052220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29555 (or 29553 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 24.

The spelling of 25105052220 in words is "twenty-five billion, one hundred five million, fifty-two thousand, two hundred twenty".