20877443 has 2 divisors, whose sum is σ = 20877444. Its totient is φ = 20877442.

The previous prime is 20877431. The next prime is 20877449. The reversal of 20877443 is 34477802.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20877443 - 2¹⁶ = 20811907 is a prime.

It is not a weakly prime, because it can be changed into another prime (20877449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10438721 + 10438722.

It is an arithmetic number, because the mean of its divisors is an integer number (10438722).

Almost surely, 2^20877443 is an apocalyptic number.

20877443 is a deficient number, since it is larger than the sum of its proper divisors (1).

20877443 is an equidigital number, since it uses as much as digits as its factorization.

20877443 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 35.

The square root of 20877443 is about 4569.1840628278. The cubic root of 20877443 is about 275.3546630613.

The spelling of 20877443 in words is "twenty million, eight hundred seventy-seven thousand, four hundred forty-three".