20863753 has 2 divisors, whose sum is σ = 20863754. Its totient is φ = 20863752.

The previous prime is 20863751. The next prime is 20863763. The reversal of 20863753 is 35736802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19245769 + 1617984 = 4387^2 + 1272^2 .

It is a cyclic number.

It is not a de Polignac number, because 20863753 - 2¹ = 20863751 is a prime.

Together with 20863751, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20863751) 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, 10431876 + 10431877.

It is an arithmetic number, because the mean of its divisors is an integer number (10431877).

Almost surely, 2^20863753 is an apocalyptic number.

It is an amenable number.

20863753 is a deficient number, since it is larger than the sum of its proper divisors (1).

20863753 is an equidigital number, since it uses as much as digits as its factorization.

20863753 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 20863753 is about 4567.6857378765. The cubic root of 20863753 is about 275.2944636460.

The spelling of 20863753 in words is "twenty million, eight hundred sixty-three thousand, seven hundred fifty-three".