20774473 has 2 divisors, whose sum is σ = 20774474. Its totient is φ = 20774472.

The previous prime is 20774471. The next prime is 20774477. The reversal of 20774473 is 37447702.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16224784 + 4549689 = 4028^2 + 2133^2 .

It is a cyclic number.

It is not a de Polignac number, because 20774473 - 2¹ = 20774471 is a prime.

Together with 20774471, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20774471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10387236 + 10387237.

It is an arithmetic number, because the mean of its divisors is an integer number (10387237).

Almost surely, 2^20774473 is an apocalyptic number.

It is an amenable number.

20774473 is a deficient number, since it is larger than the sum of its proper divisors (1).

20774473 is an equidigital number, since it uses as much as digits as its factorization.

20774473 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32928, while the sum is 34.

The square root of 20774473 is about 4557.9022587151. The cubic root of 20774473 is about 274.9012229268.

The spelling of 20774473 in words is "twenty million, seven hundred seventy-four thousand, four hundred seventy-three".