20328877 has 2 divisors, whose sum is σ = 20328878. Its totient is φ = 20328876.

The previous prime is 20328859. The next prime is 20328887. The reversal of 20328877 is 77882302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19105641 + 1223236 = 4371^2 + 1106^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20328877 is a prime.

It is a super-2 number, since 2×20328877² = 826526480162258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20328817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10164438 + 10164439.

It is an arithmetic number, because the mean of its divisors is an integer number (10164439).

Almost surely, 2^20328877 is an apocalyptic number.

It is an amenable number.

20328877 is a deficient number, since it is larger than the sum of its proper divisors (1).

20328877 is an equidigital number, since it uses as much as digits as its factorization.

20328877 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37632, while the sum is 37.

The square root of 20328877 is about 4508.7555932874. The cubic root of 20328877 is about 272.9215292363.

The spelling of 20328877 in words is "twenty million, three hundred twenty-eight thousand, eight hundred seventy-seven".