20485093 has 2 divisors, whose sum is σ = 20485094. Its totient is φ = 20485092.

The previous prime is 20485067. The next prime is 20485099. The reversal of 20485093 is 39058402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15000129 + 5484964 = 3873^2 + 2342^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20485093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20485099) 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, 10242546 + 10242547.

It is an arithmetic number, because the mean of its divisors is an integer number (10242547).

Almost surely, 2^20485093 is an apocalyptic number.

It is an amenable number.

20485093 is a deficient number, since it is larger than the sum of its proper divisors (1).

20485093 is an equidigital number, since it uses as much as digits as its factorization.

20485093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 20485093 is about 4526.0460669330. The cubic root of 20485093 is about 273.6188290351.

The spelling of 20485093 in words is "twenty million, four hundred eighty-five thousand, ninety-three".