20303137 has 2 divisors, whose sum is σ = 20303138. Its totient is φ = 20303136.

The previous prime is 20303123. The next prime is 20303141. The reversal of 20303137 is 73130302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19219456 + 1083681 = 4384^2 + 1041^2 .

It is a cyclic number.

It is not a de Polignac number, because 20303137 - 2¹⁹ = 19778849 is a prime.

It is not a weakly prime, because it can be changed into another prime (20303147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10151568 + 10151569.

It is an arithmetic number, because the mean of its divisors is an integer number (10151569).

Almost surely, 2^20303137 is an apocalyptic number.

It is an amenable number.

20303137 is a deficient number, since it is larger than the sum of its proper divisors (1).

20303137 is an equidigital number, since it uses as much as digits as its factorization.

20303137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 378, while the sum is 19.

The square root of 20303137 is about 4505.9002430147. The cubic root of 20303137 is about 272.8062914030.

Adding to 20303137 its reverse (73130302), we get a palindrome (93433439).

The spelling of 20303137 in words is "twenty million, three hundred three thousand, one hundred thirty-seven".