20706293 has 2 divisors, whose sum is σ = 20706294. Its totient is φ = 20706292.

The previous prime is 20706269. The next prime is 20706307. The reversal of 20706293 is 39260702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17960644 + 2745649 = 4238^2 + 1657^2 .

It is a cyclic number.

It is not a de Polignac number, because 20706293 - 2¹⁴ = 20689909 is a prime.

It is a Sophie Germain 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 (20706593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10353146 + 10353147.

It is an arithmetic number, because the mean of its divisors is an integer number (10353147).

Almost surely, 2^20706293 is an apocalyptic number.

It is an amenable number.

20706293 is a deficient number, since it is larger than the sum of its proper divisors (1).

20706293 is an equidigital number, since it uses as much as digits as its factorization.

20706293 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 20706293 is about 4550.4167940970. The cubic root of 20706293 is about 274.6001594231.

Adding to 20706293 its reverse (39260702), we get a palindrome (59966995).

The spelling of 20706293 in words is "twenty million, seven hundred six thousand, two hundred ninety-three".