20214647 has 2 divisors, whose sum is σ = 20214648. Its totient is φ = 20214646.

The previous prime is 20214611. The next prime is 20214661. The reversal of 20214647 is 74641202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20214647 - 2⁸ = 20214391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20214947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10107323 + 10107324.

It is an arithmetic number, because the mean of its divisors is an integer number (10107324).

Almost surely, 2^20214647 is an apocalyptic number.

20214647 is a deficient number, since it is larger than the sum of its proper divisors (1).

20214647 is an equidigital number, since it uses as much as digits as its factorization.

20214647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 20214647 is about 4496.0701729399. The cubic root of 20214647 is about 272.4093776039.

Adding to 20214647 its reverse (74641202), we get a palindrome (94855849).

The spelling of 20214647 in words is "twenty million, two hundred fourteen thousand, six hundred forty-seven".