20714549 has 4 divisors (see below), whose sum is σ = 20728236. Its totient is φ = 20700864.

The previous prime is 20714539. The next prime is 20714567. The reversal of 20714549 is 94541702.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14554225 + 6160324 = 3815^2 + 2482^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20714549 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20714509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4244 + ... + 7709.

It is an arithmetic number, because the mean of its divisors is an integer number (5182059).

Almost surely, 2^20714549 is an apocalyptic number.

It is an amenable number.

20714549 is a deficient number, since it is larger than the sum of its proper divisors (13687).

20714549 is a wasteful number, since it uses less digits than its factorization.

20714549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13686.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 20714549 is about 4551.3238733362. The cubic root of 20714549 is about 274.6366507074.

The spelling of 20714549 in words is "twenty million, seven hundred fourteen thousand, five hundred forty-nine".