20375556959 has 2 divisors, whose sum is σ = 20375556960. Its totient is φ = 20375556958.

The previous prime is 20375556893. The next prime is 20375556989. The reversal of 20375556959 is 95965557302.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20375556959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20375556989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10187778479 + 10187778480.

It is an arithmetic number, because the mean of its divisors is an integer number (10187778480).

Almost surely, 2^20375556959 is an apocalyptic number.

20375556959 is a deficient number, since it is larger than the sum of its proper divisors (1).

20375556959 is an equidigital number, since it uses as much as digits as its factorization.

20375556959 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12757500, while the sum is 56.

The spelling of 20375556959 in words is "twenty billion, three hundred seventy-five million, five hundred fifty-six thousand, nine hundred fifty-nine".