20373449 has 2 divisors, whose sum is σ = 20373450. Its totient is φ = 20373448.

The previous prime is 20373403. The next prime is 20373473. The reversal of 20373449 is 94437302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11343424 + 9030025 = 3368^2 + 3005^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20373449 is a prime.

It is a zygodrome in base 8.

It is not a weakly prime, because it can be changed into another prime (20373049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10186724 + 10186725.

It is an arithmetic number, because the mean of its divisors is an integer number (10186725).

Almost surely, 2^20373449 is an apocalyptic number.

It is an amenable number.

20373449 is a deficient number, since it is larger than the sum of its proper divisors (1).

20373449 is an equidigital number, since it uses as much as digits as its factorization.

20373449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 32.

The square root of 20373449 is about 4513.6957141571. The cubic root of 20373449 is about 273.1208479803.

The spelling of 20373449 in words is "twenty million, three hundred seventy-three thousand, four hundred forty-nine".