20680277 has 8 divisors (see below), whose sum is σ = 21916440. Its totient is φ = 19479040.

The previous prime is 20680271. The next prime is 20680333. The reversal of 20680277 is 77208602.

It can be written as a sum of positive squares in 4 ways, for example, as 14161 + 20666116 = 119^2 + 4546^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20680277 - 2⁶ = 20680213 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 (20680271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7508 + ... + 9885.

It is an arithmetic number, because the mean of its divisors is an integer number (2739555).

Almost surely, 2^20680277 is an apocalyptic number.

It is an amenable number.

20680277 is a deficient number, since it is larger than the sum of its proper divisors (1236163).

20680277 is a wasteful number, since it uses less digits than its factorization.

20680277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17463.

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 20680277 is about 4547.5572563740. The cubic root of 20680277 is about 274.4851059655.

Adding to 20680277 its reverse (77208602), we get a palindrome (97888879).

The spelling of 20680277 in words is "twenty million, six hundred eighty thousand, two hundred seventy-seven".