20575162109 has 2 divisors, whose sum is σ = 20575162110. Its totient is φ = 20575162108.

The previous prime is 20575162043. The next prime is 20575162159. The reversal of 20575162109 is 90126157502.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13686660100 + 6888502009 = 116990^2 + 82997^2 .

It is a cyclic number.

It is not a de Polignac number, because 20575162109 - 2¹⁶ = 20575096573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20575162159) 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, 10287581054 + 10287581055.

It is an arithmetic number, because the mean of its divisors is an integer number (10287581055).

Almost surely, 2^20575162109 is an apocalyptic number.

It is an amenable number.

20575162109 is a deficient number, since it is larger than the sum of its proper divisors (1).

20575162109 is an equidigital number, since it uses as much as digits as its factorization.

20575162109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37800, while the sum is 38.

The spelling of 20575162109 in words is "twenty billion, five hundred seventy-five million, one hundred sixty-two thousand, one hundred nine".