20675507 has 2 divisors, whose sum is σ = 20675508. Its totient is φ = 20675506.

The previous prime is 20675483. The next prime is 20675509. The reversal of 20675507 is 70557602.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20675507 - 2⁶ = 20675443 is a prime.

Together with 20675509, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20675509) 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, 10337753 + 10337754.

It is an arithmetic number, because the mean of its divisors is an integer number (10337754).

Almost surely, 2^20675507 is an apocalyptic number.

20675507 is a deficient number, since it is larger than the sum of its proper divisors (1).

20675507 is an equidigital number, since it uses as much as digits as its factorization.

20675507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14700, while the sum is 32.

The square root of 20675507 is about 4547.0327687405. The cubic root of 20675507 is about 274.4640005964.

The spelling of 20675507 in words is "twenty million, six hundred seventy-five thousand, five hundred seven".