20653441 has 4 divisors (see below), whose sum is σ = 20992084. Its totient is φ = 20314800.

The previous prime is 20653439. The next prime is 20653447. The reversal of 20653441 is 14435602.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14435602 = 2 ⋅7217801.

It can be written as a sum of positive squares in 2 ways, for example, as 7403841 + 13249600 = 2721^2 + 3640^2 .

It is a cyclic number.

It is not a de Polignac number, because 20653441 - 2¹ = 20653439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20653447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 169230 + ... + 169351.

It is an arithmetic number, because the mean of its divisors is an integer number (5248021).

Almost surely, 2^20653441 is an apocalyptic number.

It is an amenable number.

20653441 is a deficient number, since it is larger than the sum of its proper divisors (338643).

20653441 is an equidigital number, since it uses as much as digits as its factorization.

20653441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338642.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 20653441 is about 4544.6057034687. The cubic root of 20653441 is about 274.3663249835.

The spelling of 20653441 in words is "twenty million, six hundred fifty-three thousand, four hundred forty-one".