25565020 has 24 divisors (see below), whose sum is σ = 57816864. Its totient is φ = 9439296.

The previous prime is 25565011. The next prime is 25565021. The reversal of 25565020 is 2056552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25565021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48904 + ... + 49423.

It is an arithmetic number, because the mean of its divisors is an integer number (2409036).

Almost surely, 2^25565020 is an apocalyptic number.

25565020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25565020 is an abundant number, since it is smaller than the sum of its proper divisors (32251844).

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

25565020 is a wasteful number, since it uses less digits than its factorization.

25565020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98349 (or 98347 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 25565020 is about 5056.1863098584. The cubic root of 25565020 is about 294.5882218063.

The spelling of 25565020 in words is "twenty-five million, five hundred sixty-five thousand, twenty".