20814261 has 16 divisors (see below), whose sum is σ = 30158016. Its totient is φ = 12692736.

The previous prime is 20814259. The next prime is 20814263. The reversal of 20814261 is 16241802.

It is an interprime number because it is at equal distance from previous prime (20814259) and next prime (20814263).

It is not a de Polignac number, because 20814261 - 2¹ = 20814259 is a prime.

It is a super-2 number, since 2×20814261² = 866466921952242, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20814263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2046 + ... + 6768.

It is an arithmetic number, because the mean of its divisors is an integer number (1884876).

Almost surely, 2^20814261 is an apocalyptic number.

It is an amenable number.

20814261 is a deficient number, since it is larger than the sum of its proper divisors (9343755).

20814261 is a wasteful number, since it uses less digits than its factorization.

20814261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4852.

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 20814261 is about 4562.2648980523. The cubic root of 20814261 is about 275.0766111621.

The spelling of 20814261 in words is "twenty million, eight hundred fourteen thousand, two hundred sixty-one".