20196647 has 2 divisors, whose sum is σ = 20196648. Its totient is φ = 20196646.

The previous prime is 20196623. The next prime is 20196653. The reversal of 20196647 is 74669102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20196647 - 2¹⁴ = 20180263 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20196607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10098323 + 10098324.

It is an arithmetic number, because the mean of its divisors is an integer number (10098324).

Almost surely, 2^20196647 is an apocalyptic number.

20196647 is a deficient number, since it is larger than the sum of its proper divisors (1).

20196647 is an equidigital number, since it uses as much as digits as its factorization.

20196647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 20196647 is about 4494.0679790141. The cubic root of 20196647 is about 272.3284985444.

The spelling of 20196647 in words is "twenty million, one hundred ninety-six thousand, six hundred forty-seven".