25305320 has 32 divisors (see below), whose sum is σ = 57196800. Its totient is φ = 10075968.

The previous prime is 25305311. The next prime is 25305337. The reversal of 25305320 is 2350352.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 25305292 and 25305301.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8237 + ... + 10883.

It is an arithmetic number, because the mean of its divisors is an integer number (1787400).

Almost surely, 2^25305320 is an apocalyptic number.

25305320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25305320 is an abundant number, since it is smaller than the sum of its proper divisors (31891480).

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

25305320 is a wasteful number, since it uses less digits than its factorization.

25305320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2897 (or 2893 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 20.

The square root of 25305320 is about 5030.4393446299. The cubic root of 25305320 is about 293.5873087343.

Adding to 25305320 its reverse (2350352), we get a palindrome (27655672).

The spelling of 25305320 in words is "twenty-five million, three hundred five thousand, three hundred twenty".