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25020 = 22325139

25020 has 36 divisors (see below), whose sum is σ = 76440. Its totient is φ = 6624.

The previous prime is 25013. The next prime is 25031. The reversal of 25020 is 2052.

25020 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a nialpdrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 24993 and 25011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 111 + ... + 249.

225020 is an apocalyptic number.

25020 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 25020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38220).

25020 is an abundant number, since it is smaller than the sum of its proper divisors (51420).

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

25020 is a wasteful number, since it uses less digits than its factorization.

25020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154 (or 149 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 9.

The square root of 25020 is about 158.1771159176. The cubic root of 25020 is about 29.2479726844.

Adding to 25020 its reverse (2052), we get a palindrome (27072).

The spelling of 25020 in words is "twenty-five thousand, twenty".

Divisors: 1 2 3 4 5 6 9 10 12 15 18 20 30 36 45 60 90 139 180 278 417 556 695 834 1251 1390 1668 2085 2502 2780 4170 5004 6255 8340 12510 25020