20415391566907 has 2 divisors, whose sum is σ = 20415391566908. Its totient is φ = 20415391566906.

The previous prime is 20415391566893. The next prime is 20415391566917. The reversal of 20415391566907 is 70966519351402.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20415391566907 is a prime.

It is not a weakly prime, because it can be changed into another prime (20415391566917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10207695783453 + 10207695783454.

It is an arithmetic number, because the mean of its divisors is an integer number (10207695783454).

Almost surely, 2^{20415391566907} is an apocalyptic number.

20415391566907 is a deficient number, since it is larger than the sum of its proper divisors (1).

20415391566907 is an equidigital number, since it uses as much as digits as its factorization.

20415391566907 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12247200, while the sum is 58.

The spelling of 20415391566907 in words is "twenty trillion, four hundred fifteen billion, three hundred ninety-one million, five hundred sixty-six thousand, nine hundred seven".