20814427 has 4 divisors (see below), whose sum is σ = 20885760. Its totient is φ = 20743096.

The previous prime is 20814403. The next prime is 20814439. The reversal of 20814427 is 72441802.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20814427 - 2¹⁹ = 20290139 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20814395 and 20814404.

It is not an unprimeable number, because it can be changed into a prime (20814127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35227 + ... + 35812.

It is an arithmetic number, because the mean of its divisors is an integer number (5221440).

Almost surely, 2^20814427 is an apocalyptic number.

20814427 is a deficient number, since it is larger than the sum of its proper divisors (71333).

20814427 is an equidigital number, since it uses as much as digits as its factorization.

20814427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71332.

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 20814427 is about 4562.2830907343. The cubic root of 20814427 is about 275.0773424331.

The spelling of 20814427 in words is "twenty million, eight hundred fourteen thousand, four hundred twenty-seven".