20629907 has 2 divisors, whose sum is σ = 20629908. Its totient is φ = 20629906.

The previous prime is 20629901. The next prime is 20629909. The reversal of 20629907 is 70992602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20629907 - 2²⁴ = 3852691 is a prime.

Together with 20629909, 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 (20629901) 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, 10314953 + 10314954.

It is an arithmetic number, because the mean of its divisors is an integer number (10314954).

Almost surely, 2^20629907 is an apocalyptic number.

20629907 is a deficient number, since it is larger than the sum of its proper divisors (1).

20629907 is an equidigital number, since it uses as much as digits as its factorization.

20629907 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 20629907 is about 4542.0157419366. The cubic root of 20629907 is about 274.2620745401.

The spelling of 20629907 in words is "twenty million, six hundred twenty-nine thousand, nine hundred seven".