20842763 has 2 divisors, whose sum is σ = 20842764. Its totient is φ = 20842762.

The previous prime is 20842751. The next prime is 20842817. The reversal of 20842763 is 36724802.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20842763 - 2⁴ = 20842747 is a prime.

It is not a weakly prime, because it can be changed into another prime (20842733) 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, 10421381 + 10421382.

It is an arithmetic number, because the mean of its divisors is an integer number (10421382).

Almost surely, 2^20842763 is an apocalyptic number.

20842763 is a deficient number, since it is larger than the sum of its proper divisors (1).

20842763 is an equidigital number, since it uses as much as digits as its factorization.

20842763 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 20842763 is about 4565.3874972449. The cubic root of 20842763 is about 275.2021125770.

The spelling of 20842763 in words is "twenty million, eight hundred forty-two thousand, seven hundred sixty-three".