20427359 has 2 divisors, whose sum is σ = 20427360. Its totient is φ = 20427358.

The previous prime is 20427347. The next prime is 20427361. The reversal of 20427359 is 95372402.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20427359 is a prime.

It is a Sophie Germain prime.

Together with 20427361, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_1295960 and since 20427359 and 1295960 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20427859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10213679 + 10213680.

It is an arithmetic number, because the mean of its divisors is an integer number (10213680).

Almost surely, 2^20427359 is an apocalyptic number.

20427359 is a deficient number, since it is larger than the sum of its proper divisors (1).

20427359 is an equidigital number, since it uses as much as digits as its factorization.

20427359 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 20427359 is about 4519.6635936760. The cubic root of 20427359 is about 273.3615366826.

The spelling of 20427359 in words is "twenty million, four hundred twenty-seven thousand, three hundred fifty-nine".