25500020 has 48 divisors (see below), whose sum is σ = 65912448. Its totient is φ = 8069760.

The previous prime is 25500001. The next prime is 25500023. The reversal of 25500020 is 2000552.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 25499968 and 25500004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25500023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5186 + ... + 8825.

It is an arithmetic number, because the mean of its divisors is an integer number (1373176).

Almost surely, 2^25500020 is an apocalyptic number.

25500020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25500020 is an abundant number, since it is smaller than the sum of its proper divisors (40412428).

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

25500020 is a wasteful number, since it uses less digits than its factorization.

25500020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14040 (or 14038 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 14.

The square root of 25500020 is about 5049.7544494757. The cubic root of 25500020 is about 294.3383427953.

Adding to 25500020 its reverse (2000552), we get a palindrome (27500572).

The spelling of 25500020 in words is "twenty-five million, five hundred thousand, twenty".