20454340525 has 6 divisors (see below), whose sum is σ = 25363382282. Its totient is φ = 16363472400.

The previous prime is 20454340499. The next prime is 20454340553. The reversal of 20454340525 is 52504345402.

It can be written as a sum of positive squares in 3 ways, for example, as 188540361 + 20265800164 = 13731^2 + 142358^2 .

It is not a de Polignac number, because 20454340525 - 2⁷ = 20454340397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 409086786 + ... + 409086835.

Almost surely, 2^20454340525 is an apocalyptic number.

20454340525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20454340525 is a deficient number, since it is larger than the sum of its proper divisors (4909041757).

20454340525 is an equidigital number, since it uses as much as digits as its factorization.

20454340525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 818173631 (or 818173626 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 34.

Adding to 20454340525 its reverse (52504345402), we get a palindrome (72958685927).

The spelling of 20454340525 in words is "twenty billion, four hundred fifty-four million, three hundred forty thousand, five hundred twenty-five".