20236427 has 2 divisors, whose sum is σ = 20236428. Its totient is φ = 20236426.

The previous prime is 20236423. The next prime is 20236441. The reversal of 20236427 is 72463202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20236427 - 2² = 20236423 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 20236396 and 20236405.

It is not a weakly prime, because it can be changed into another prime (20236423) 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 as a sum of consecutive naturals, namely, 10118213 + 10118214.

It is an arithmetic number, because the mean of its divisors is an integer number (10118214).

Almost surely, 2^20236427 is an apocalyptic number.

20236427 is a deficient number, since it is larger than the sum of its proper divisors (1).

20236427 is an equidigital number, since it uses as much as digits as its factorization.

20236427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 26.

The square root of 20236427 is about 4498.4916360931. The cubic root of 20236427 is about 272.5071770968.

Adding to 20236427 its reverse (72463202), we get a palindrome (92699629).

The spelling of 20236427 in words is "twenty million, two hundred thirty-six thousand, four hundred twenty-seven".