25430020 has 96 divisors (see below), whose sum is σ = 68140800. Its totient is φ = 7902720.

The previous prime is 25430017. The next prime is 25430023. The reversal of 25430020 is 2003452.

It is an interprime number because it is at equal distance from previous prime (25430017) and next prime (25430023).

It is a junction number, because it is equal to n+sod(n) for n = 25429976 and 25430003.

It is not an unprimeable number, because it can be changed into a prime (25430023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 75292 + ... + 75628.

It is an arithmetic number, because the mean of its divisors is an integer number (709800).

Almost surely, 2^25430020 is an apocalyptic number.

25430020 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 25430020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34070400).

25430020 is an abundant number, since it is smaller than the sum of its proper divisors (42710780).

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

25430020 is a wasteful number, since it uses less digits than its factorization.

25430020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378 (or 362 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 16.

The square root of 25430020 is about 5042.8186562675. The cubic root of 25430020 is about 294.0687669828.

Adding to 25430020 its reverse (2003452), we get a palindrome (27433472).

The spelling of 25430020 in words is "twenty-five million, four hundred thirty thousand, twenty".