20930093 has 2 divisors, whose sum is σ = 20930094. Its totient is φ = 20930092.

The previous prime is 20930057. The next prime is 20930099. The reversal of 20930093 is 39003902.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20187049 + 743044 = 4493^2 + 862^2 .

It is a cyclic number.

It is not a de Polignac number, because 20930093 - 2¹⁴ = 20913709 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20930099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10465046 + 10465047.

It is an arithmetic number, because the mean of its divisors is an integer number (10465047).

Almost surely, 2^20930093 is an apocalyptic number.

It is an amenable number.

20930093 is a deficient number, since it is larger than the sum of its proper divisors (1).

20930093 is an equidigital number, since it uses as much as digits as its factorization.

20930093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1458, while the sum is 26.

The square root of 20930093 is about 4574.9418575540. The cubic root of 20930093 is about 275.5859374440.

Adding to 20930093 its reverse (39003902), we get a palindrome (59933995).

The spelling of 20930093 in words is "twenty million, nine hundred thirty thousand, ninety-three".