20771349 has 4 divisors (see below), whose sum is σ = 27695136. Its totient is φ = 13847564.

The previous prime is 20771341. The next prime is 20771371. The reversal of 20771349 is 94317702.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20771349 - 2³ = 20771341 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20771341) 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 in 3 ways as a sum of consecutive naturals, for example, 3461889 + ... + 3461894.

It is an arithmetic number, because the mean of its divisors is an integer number (6923784).

Almost surely, 2^20771349 is an apocalyptic number.

It is an amenable number.

20771349 is a deficient number, since it is larger than the sum of its proper divisors (6923787).

20771349 is an equidigital number, since it uses as much as digits as its factorization.

20771349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6923786.

The product of its (nonzero) digits is 10584, while the sum is 33.

The square root of 20771349 is about 4557.5595443176. The cubic root of 20771349 is about 274.8874426419.

The spelling of 20771349 in words is "twenty million, seven hundred seventy-one thousand, three hundred forty-nine".