20734277 has 2 divisors, whose sum is σ = 20734278. Its totient is φ = 20734276.

The previous prime is 20734267. The next prime is 20734279. The reversal of 20734277 is 77243702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16008001 + 4726276 = 4001^2 + 2174^2 .

It is a cyclic number.

It is not a de Polignac number, because 20734277 - 2¹⁰ = 20733253 is a prime.

Together with 20734279, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20734279) 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 as a sum of consecutive naturals, namely, 10367138 + 10367139.

It is an arithmetic number, because the mean of its divisors is an integer number (10367139).

Almost surely, 2^20734277 is an apocalyptic number.

It is an amenable number.

20734277 is a deficient number, since it is larger than the sum of its proper divisors (1).

20734277 is an equidigital number, since it uses as much as digits as its factorization.

20734277 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16464, while the sum is 32.

The square root of 20734277 is about 4553.4906390592. The cubic root of 20734277 is about 274.7238086554.

Adding to 20734277 its reverse (77243702), we get a palindrome (97977979).

The spelling of 20734277 in words is "twenty million, seven hundred thirty-four thousand, two hundred seventy-seven".