20776741 has 2 divisors, whose sum is σ = 20776742. Its totient is φ = 20776740.

The previous prime is 20776739. The next prime is 20776759. The reversal of 20776741 is 14767702.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20657025 + 119716 = 4545^2 + 346^2 .

It is a cyclic number.

It is not a de Polignac number, because 20776741 - 2¹ = 20776739 is a prime.

Together with 20776739, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 20776697 and 20776706.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20776711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10388370 + 10388371.

It is an arithmetic number, because the mean of its divisors is an integer number (10388371).

Almost surely, 2^20776741 is an apocalyptic number.

It is an amenable number.

20776741 is a deficient number, since it is larger than the sum of its proper divisors (1).

20776741 is an equidigital number, since it uses as much as digits as its factorization.

20776741 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16464, while the sum is 34.

The square root of 20776741 is about 4558.1510505906. The cubic root of 20776741 is about 274.9112264422.

The spelling of 20776741 in words is "twenty million, seven hundred seventy-six thousand, seven hundred forty-one".