20714689 has 2 divisors, whose sum is σ = 20714690. Its totient is φ = 20714688.

The previous prime is 20714663. The next prime is 20714711. The reversal of 20714689 is 98641702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16646400 + 4068289 = 4080^2 + 2017^2 .

It is a cyclic number.

It is not a de Polignac number, because 20714689 - 2⁵ = 20714657 is a prime.

It is a super-3 number, since 3×20714689³ (a number of 23 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (20714609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10357344 + 10357345.

It is an arithmetic number, because the mean of its divisors is an integer number (10357345).

Almost surely, 2^20714689 is an apocalyptic number.

It is an amenable number.

20714689 is a deficient number, since it is larger than the sum of its proper divisors (1).

20714689 is an equidigital number, since it uses as much as digits as its factorization.

20714689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 20714689 is about 4551.3392534506. The cubic root of 20714689 is about 274.6372694198.

The spelling of 20714689 in words is "twenty million, seven hundred fourteen thousand, six hundred eighty-nine".