20254566 has 16 divisors (see below), whose sum is σ = 40737600. Its totient is φ = 6713448.

The previous prime is 20254547. The next prime is 20254567. The reversal of 20254566 is 66545202.

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 7 ways as a sum of consecutive naturals, for example, 8356 + ... + 10503.

It is an arithmetic number, because the mean of its divisors is an integer number (2546100).

Almost surely, 2^20254566 is an apocalyptic number.

20254566 is an abundant number, since it is smaller than the sum of its proper divisors (20483034).

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

20254566 is a wasteful number, since it uses less digits than its factorization.

20254566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19043.

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 20254566 is about 4500.5073047380. The cubic root of 20254566 is about 272.5885737374.

Adding to 20254566 its reverse (66545202), we get a palindrome (86799768).

The spelling of 20254566 in words is "twenty million, two hundred fifty-four thousand, five hundred sixty-six".