20575956859 has 2 divisors, whose sum is σ = 20575956860. Its totient is φ = 20575956858.

The previous prime is 20575956857. The next prime is 20575956871. The reversal of 20575956859 is 95865957502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20575956859 - 2¹ = 20575956857 is a prime.

It is a super-3 number, since 3×20575956859³ (a number of 32 digits) contains 333 as substring.

Together with 20575956857, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 20575956797 and 20575956806.

It is not a weakly prime, because it can be changed into another prime (20575956857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10287978429 + 10287978430.

It is an arithmetic number, because the mean of its divisors is an integer number (10287978430).

Almost surely, 2^20575956859 is an apocalyptic number.

20575956859 is a deficient number, since it is larger than the sum of its proper divisors (1).

20575956859 is an equidigital number, since it uses as much as digits as its factorization.

20575956859 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34020000, while the sum is 61.

The spelling of 20575956859 in words is "twenty billion, five hundred seventy-five million, nine hundred fifty-six thousand, eight hundred fifty-nine".