20320877 has 2 divisors, whose sum is σ = 20320878. Its totient is φ = 20320876.

The previous prime is 20320849. The next prime is 20320907. The reversal of 20320877 is 77802302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15594601 + 4726276 = 3949^2 + 2174^2 .

It is a cyclic number.

It is not a de Polignac number, because 20320877 - 2¹⁰ = 20319853 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20320837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10160438 + 10160439.

It is an arithmetic number, because the mean of its divisors is an integer number (10160439).

Almost surely, 2^20320877 is an apocalyptic number.

It is an amenable number.

20320877 is a deficient number, since it is larger than the sum of its proper divisors (1).

20320877 is an equidigital number, since it uses as much as digits as its factorization.

20320877 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 20320877 is about 4507.8683432416. The cubic root of 20320877 is about 272.8857237054.

The spelling of 20320877 in words is "twenty million, three hundred twenty thousand, eight hundred seventy-seven".