20340373 has 2 divisors, whose sum is σ = 20340374. Its totient is φ = 20340372.

The previous prime is 20340323. The next prime is 20340391. The reversal of 20340373 is 37304302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14303524 + 6036849 = 3782^2 + 2457^2 .

It is a cyclic number.

It is not a de Polignac number, because 20340373 - 2¹³ = 20332181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20340323) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10170186 + 10170187.

It is an arithmetic number, because the mean of its divisors is an integer number (10170187).

Almost surely, 2^20340373 is an apocalyptic number.

It is an amenable number.

20340373 is a deficient number, since it is larger than the sum of its proper divisors (1).

20340373 is an equidigital number, since it uses as much as digits as its factorization.

20340373 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 22.

The square root of 20340373 is about 4510.0302659738. The cubic root of 20340373 is about 272.9729653398.

Adding to 20340373 its reverse (37304302), we get a palindrome (57644675).

The spelling of 20340373 in words is "twenty million, three hundred forty thousand, three hundred seventy-three".