20714647 has 2 divisors, whose sum is σ = 20714648. Its totient is φ = 20714646.

The previous prime is 20714621. The next prime is 20714657. The reversal of 20714647 is 74641702.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20714647 - 2¹⁵ = 20681879 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 (20714657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10357323 + 10357324.

It is an arithmetic number, because the mean of its divisors is an integer number (10357324).

Almost surely, 2^20714647 is an apocalyptic number.

20714647 is a deficient number, since it is larger than the sum of its proper divisors (1).

20714647 is an equidigital number, since it uses as much as digits as its factorization.

20714647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9408, while the sum is 31.

The square root of 20714647 is about 4551.3346394217. The cubic root of 20714647 is about 274.6370838063.

The spelling of 20714647 in words is "twenty million, seven hundred fourteen thousand, six hundred forty-seven".