20553703 has 2 divisors, whose sum is σ = 20553704. Its totient is φ = 20553702.

The previous prime is 20553691. The next prime is 20553707. The reversal of 20553703 is 30735502.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20553703 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20553707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10276851 + 10276852.

It is an arithmetic number, because the mean of its divisors is an integer number (10276852).

Almost surely, 2^20553703 is an apocalyptic number.

20553703 is a deficient number, since it is larger than the sum of its proper divisors (1).

20553703 is an equidigital number, since it uses as much as digits as its factorization.

20553703 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3150, while the sum is 25.

The square root of 20553703 is about 4533.6191944185. The cubic root of 20553703 is about 273.9239625974.

The spelling of 20553703 in words is "twenty million, five hundred fifty-three thousand, seven hundred three".