20254565 has 24 divisors (see below), whose sum is σ = 26259552. Its totient is φ = 14992640.

The previous prime is 20254547. The next prime is 20254567. The reversal of 20254565 is 56545202.

It is not a de Polignac number, because 20254565 - 2⁸ = 20254309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20254567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 154550 + ... + 154680.

It is an arithmetic number, because the mean of its divisors is an integer number (1094148).

Almost surely, 2^20254565 is an apocalyptic number.

It is an amenable number.

20254565 is a deficient number, since it is larger than the sum of its proper divisors (6004987).

20254565 is a wasteful number, since it uses less digits than its factorization.

20254565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277 (or 260 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 29.

The square root of 20254565 is about 4500.5071936394. The cubic root of 20254565 is about 272.5885692514.

Adding to 20254565 its reverse (56545202), we get a palindrome (76799767).

The spelling of 20254565 in words is "twenty million, two hundred fifty-four thousand, five hundred sixty-five".