20925566107 has 2 divisors, whose sum is σ = 20925566108. Its totient is φ = 20925566106.

The previous prime is 20925566009. The next prime is 20925566111. The reversal of 20925566107 is 70166552902.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20925566107 - 2¹⁵ = 20925533339 is a prime.

It is not a weakly prime, because it can be changed into another prime (20925566507) 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, 10462783053 + 10462783054.

It is an arithmetic number, because the mean of its divisors is an integer number (10462783054).

Almost surely, 2^20925566107 is an apocalyptic number.

20925566107 is a deficient number, since it is larger than the sum of its proper divisors (1).

20925566107 is an equidigital number, since it uses as much as digits as its factorization.

20925566107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 226800, while the sum is 43.

The spelling of 20925566107 in words is "twenty billion, nine hundred twenty-five million, five hundred sixty-six thousand, one hundred seven".