20307953 has 2 divisors, whose sum is σ = 20307954. Its totient is φ = 20307952.

The previous prime is 20307929. The next prime is 20307983. The reversal of 20307953 is 35970302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15864289 + 4443664 = 3983^2 + 2108^2 .

It is a cyclic number.

It is not a de Polignac number, because 20307953 - 2²⁰ = 19259377 is a prime.

It is not a weakly prime, because it can be changed into another prime (20307923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10153976 + 10153977.

It is an arithmetic number, because the mean of its divisors is an integer number (10153977).

Almost surely, 2^20307953 is an apocalyptic number.

It is an amenable number.

20307953 is a deficient number, since it is larger than the sum of its proper divisors (1).

20307953 is an equidigital number, since it uses as much as digits as its factorization.

20307953 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5670, while the sum is 29.

The square root of 20307953 is about 4506.4346217381. The cubic root of 20307953 is about 272.8278600113.

The spelling of 20307953 in words is "twenty million, three hundred seven thousand, nine hundred fifty-three".