20109293 has 2 divisors, whose sum is σ = 20109294. Its totient is φ = 20109292.

The previous prime is 20109263. The next prime is 20109319. The reversal of 20109293 is 39290102.

It is an a-pointer prime, because the next prime (20109319) can be obtained adding 20109293 to its sum of digits (26).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19695844 + 413449 = 4438^2 + 643^2 .

It is a cyclic number.

It is not a de Polignac number, because 20109293 - 2¹⁴ = 20092909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20109233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10054646 + 10054647.

It is an arithmetic number, because the mean of its divisors is an integer number (10054647).

Almost surely, 2^20109293 is an apocalyptic number.

It is an amenable number.

20109293 is a deficient number, since it is larger than the sum of its proper divisors (1).

20109293 is an equidigital number, since it uses as much as digits as its factorization.

20109293 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 20109293 is about 4484.3386357411. The cubic root of 20109293 is about 271.9353084690.

Adding to 20109293 its reverse (39290102), we get a palindrome (59399395).

It can be divided in two parts, 20109 and 293, that added together give a palindrome (20402).

The spelling of 20109293 in words is "twenty million, one hundred nine thousand, two hundred ninety-three".