20925759489539 has 2 divisors, whose sum is σ = 20925759489540. Its totient is φ = 20925759489538.

The previous prime is 20925759489497. The next prime is 20925759489587. The reversal of 20925759489539 is 93598495752902.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20925759489539 - 2¹² = 20925759485443 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20925759489539.

It is not a weakly prime, because it can be changed into another prime (20925759485539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10462879744769 + 10462879744770.

It is an arithmetic number, because the mean of its divisors is an integer number (10462879744770).

Almost surely, 2^{20925759489539} is an apocalyptic number.

20925759489539 is a deficient number, since it is larger than the sum of its proper divisors (1).

20925759489539 is an equidigital number, since it uses as much as digits as its factorization.

20925759489539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2204496000, while the sum is 77.

The spelling of 20925759489539 in words is "twenty trillion, nine hundred twenty-five billion, seven hundred fifty-nine million, four hundred eighty-nine thousand, five hundred thirty-nine".