20714621 has 2 divisors, whose sum is σ = 20714622. Its totient is φ = 20714620.

The previous prime is 20714609. The next prime is 20714647. The reversal of 20714621 is 12641702.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15602500 + 5112121 = 3950^2 + 2261^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20714621 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 (20714521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10357310 + 10357311.

It is an arithmetic number, because the mean of its divisors is an integer number (10357311).

Almost surely, 2^20714621 is an apocalyptic number.

It is an amenable number.

20714621 is a deficient number, since it is larger than the sum of its proper divisors (1).

20714621 is an equidigital number, since it uses as much as digits as its factorization.

20714621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 20714621 is about 4551.3317831158. The cubic root of 20714621 is about 274.6369689027.

The spelling of 20714621 in words is "twenty million, seven hundred fourteen thousand, six hundred twenty-one".