20530427 has 2 divisors, whose sum is σ = 20530428. Its totient is φ = 20530426.

The previous prime is 20530423. The next prime is 20530453. The reversal of 20530427 is 72403502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20530427 - 2² = 20530423 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20530423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10265213 + 10265214.

It is an arithmetic number, because the mean of its divisors is an integer number (10265214).

Almost surely, 2^20530427 is an apocalyptic number.

20530427 is a deficient number, since it is larger than the sum of its proper divisors (1).

20530427 is an equidigital number, since it uses as much as digits as its factorization.

20530427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 23.

The square root of 20530427 is about 4531.0514232350. The cubic root of 20530427 is about 273.8205219920.

Adding to 20530427 its reverse (72403502), we get a palindrome (92933929).

The spelling of 20530427 in words is "twenty million, five hundred thirty thousand, four hundred twenty-seven".