20455307 has 2 divisors, whose sum is σ = 20455308. Its totient is φ = 20455306.

The previous prime is 20455289. The next prime is 20455321. The reversal of 20455307 is 70355402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20455307 - 2⁶ = 20455243 is a prime.

It is equal to p_1297601 and since 20455307 and 1297601 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (20455327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10227653 + 10227654.

It is an arithmetic number, because the mean of its divisors is an integer number (10227654).

Almost surely, 2^20455307 is an apocalyptic number.

20455307 is a deficient number, since it is larger than the sum of its proper divisors (1).

20455307 is an equidigital number, since it uses as much as digits as its factorization.

20455307 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4200, while the sum is 26.

The square root of 20455307 is about 4522.7543599006. The cubic root of 20455307 is about 273.4861477766.

The spelling of 20455307 in words is "twenty million, four hundred fifty-five thousand, three hundred seven".