25206455220 has 48 divisors (see below), whose sum is σ = 74729729088. Its totient is φ = 6326325760.

The previous prime is 25206455213. The next prime is 25206455221. The reversal of 25206455220 is 2255460252.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25206455221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12355086 + ... + 12357125.

It is an arithmetic number, because the mean of its divisors is an integer number (1556869356).

Almost surely, 2^25206455220 is an apocalyptic number.

25206455220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25206455220 is an abundant number, since it is smaller than the sum of its proper divisors (49523273868).

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

25206455220 is a wasteful number, since it uses less digits than its factorization.

25206455220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24712240 (or 24712238 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 33.

The spelling of 25206455220 in words is "twenty-five billion, two hundred six million, four hundred fifty-five thousand, two hundred twenty".