20420107 has 2 divisors, whose sum is σ = 20420108. Its totient is φ = 20420106.

The previous prime is 20420083. The next prime is 20420119. The reversal of 20420107 is 70102402.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20420107 is a prime.

It is not a weakly prime, because it can be changed into another prime (20420167) 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, 10210053 + 10210054.

It is an arithmetic number, because the mean of its divisors is an integer number (10210054).

Almost surely, 2^20420107 is an apocalyptic number.

20420107 is a deficient number, since it is larger than the sum of its proper divisors (1).

20420107 is an equidigital number, since it uses as much as digits as its factorization.

20420107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112, while the sum is 16.

The square root of 20420107 is about 4518.8612503594. The cubic root of 20420107 is about 273.3291837892.

Adding to 20420107 its reverse (70102402), we get a palindrome (90522509).

The spelling of 20420107 in words is "twenty million, four hundred twenty thousand, one hundred seven".