20265258 has 96 divisors (see below), whose sum is σ = 49512960. Its totient is φ = 5483520.

The previous prime is 20265253. The next prime is 20265269. The reversal of 20265258 is 85256202.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20265253) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 653703 + ... + 653733.

It is an arithmetic number, because the mean of its divisors is an integer number (515760).

Almost surely, 2^20265258 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20265258, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24756480).

20265258 is an abundant number, since it is smaller than the sum of its proper divisors (29247702).

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

20265258 is a wasteful number, since it uses less digits than its factorization.

20265258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112 (or 95 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 20265258 is about 4501.6950141030. The cubic root of 20265258 is about 272.6365300738.

The spelling of 20265258 in words is "twenty million, two hundred sixty-five thousand, two hundred fifty-eight".