20225489539 has 2 divisors, whose sum is σ = 20225489540. Its totient is φ = 20225489538.

The previous prime is 20225489491. The next prime is 20225489567. The reversal of 20225489539 is 93598452202.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20225489539 - 2⁹ = 20225489027 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20225489492 and 20225489501.

It is not a weakly prime, because it can be changed into another prime (20225489239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10112744769 + 10112744770.

It is an arithmetic number, because the mean of its divisors is an integer number (10112744770).

Almost surely, 2^20225489539 is an apocalyptic number.

20225489539 is a deficient number, since it is larger than the sum of its proper divisors (1).

20225489539 is an equidigital number, since it uses as much as digits as its factorization.

20225489539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1555200, while the sum is 49.

The spelling of 20225489539 in words is "twenty billion, two hundred twenty-five million, four hundred eighty-nine thousand, five hundred thirty-nine".