20031293 has 2 divisors, whose sum is σ = 20031294. Its totient is φ = 20031292.

The previous prime is 20031289. The next prime is 20031311. The reversal of 20031293 is 39213002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19598329 + 432964 = 4427^2 + 658^2 .

It is a cyclic number.

It is not a de Polignac number, because 20031293 - 2² = 20031289 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20031223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10015646 + 10015647.

It is an arithmetic number, because the mean of its divisors is an integer number (10015647).

Almost surely, 2^20031293 is an apocalyptic number.

It is an amenable number.

20031293 is a deficient number, since it is larger than the sum of its proper divisors (1).

20031293 is an equidigital number, since it uses as much as digits as its factorization.

20031293 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 20031293 is about 4475.6332512841. The cubic root of 20031293 is about 271.5832583383.

Adding to 20031293 its reverse (39213002), we get a palindrome (59244295).

The spelling of 20031293 in words is "twenty million, thirty-one thousand, two hundred ninety-three".