20541568 has 16 divisors (see below), whose sum is σ = 40922910. Its totient is φ = 10270720.

The previous prime is 20541557. The next prime is 20541571. The reversal of 20541568 is 86514502.

It can be written as a sum of positive squares in only one way, i.e., 20142144 + 399424 = 4488^2 + 632^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80113 + ... + 80368.

Almost surely, 2^20541568 is an apocalyptic number.

It is an amenable number.

20541568 is a deficient number, since it is larger than the sum of its proper divisors (20381342).

20541568 is an equidigital number, since it uses as much as digits as its factorization.

20541568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160495 (or 160483 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 20541568 is about 4532.2806620950. The cubic root of 20541568 is about 273.8700433323.

The spelling of 20541568 in words is "twenty million, five hundred forty-one thousand, five hundred sixty-eight".