20427599 has 2 divisors, whose sum is σ = 20427600. Its totient is φ = 20427598.

The previous prime is 20427593. The next prime is 20427601. The reversal of 20427599 is 99572402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20427599 - 2¹⁶ = 20362063 is a prime.

Together with 20427601, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20427593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10213799 + 10213800.

It is an arithmetic number, because the mean of its divisors is an integer number (10213800).

Almost surely, 2^20427599 is an apocalyptic number.

20427599 is a deficient number, since it is larger than the sum of its proper divisors (1).

20427599 is an equidigital number, since it uses as much as digits as its factorization.

20427599 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 20427599 is about 4519.6901442466. The cubic root of 20427599 is about 273.3626072487.

The spelling of 20427599 in words is "twenty million, four hundred twenty-seven thousand, five hundred ninety-nine".