20372293 has 2 divisors, whose sum is σ = 20372294. Its totient is φ = 20372292.

The previous prime is 20372279. The next prime is 20372333. The reversal of 20372293 is 39227302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11716929 + 8655364 = 3423^2 + 2942^2 .

It is a cyclic number.

It is not a de Polignac number, because 20372293 - 2¹³ = 20364101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20372263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10186146 + 10186147.

It is an arithmetic number, because the mean of its divisors is an integer number (10186147).

Almost surely, 2^20372293 is an apocalyptic number.

It is an amenable number.

20372293 is a deficient number, since it is larger than the sum of its proper divisors (1).

20372293 is an equidigital number, since it uses as much as digits as its factorization.

20372293 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 28.

The square root of 20372293 is about 4513.5676576296. The cubic root of 20372293 is about 273.1156822100.

Adding to 20372293 its reverse (39227302), we get a palindrome (59599595).

The spelling of 20372293 in words is "twenty million, three hundred seventy-two thousand, two hundred ninety-three".