20673277 has 4 divisors (see below), whose sum is σ = 20787676. Its totient is φ = 20558880.

The previous prime is 20673271. The next prime is 20673281. The reversal of 20673277 is 77237602.

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 549081 + 20124196 = 741^2 + 4486^2 .

It is a cyclic number.

It is not a de Polignac number, because 20673277 - 2²³ = 12284669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20673271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56928 + ... + 57289.

It is an arithmetic number, because the mean of its divisors is an integer number (5196919).

Almost surely, 2^20673277 is an apocalyptic number.

It is an amenable number.

20673277 is a deficient number, since it is larger than the sum of its proper divisors (114399).

20673277 is a wasteful number, since it uses less digits than its factorization.

20673277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114398.

The product of its (nonzero) digits is 24696, while the sum is 34.

The square root of 20673277 is about 4546.7875472690. The cubic root of 20673277 is about 274.4541326123.

The spelling of 20673277 in words is "twenty million, six hundred seventy-three thousand, two hundred seventy-seven".