20345233304425 has 6 divisors (see below), whose sum is σ = 25228089297518. Its totient is φ = 16276186643520.

The previous prime is 20345233304423. The next prime is 20345233304443. The reversal of 20345233304425 is 52440333254302.

It can be written as a sum of positive squares in 3 ways, for example, as 253191744 + 20344980112681 = 15912^2 + 4510541^2 .

It is not a de Polignac number, because 20345233304425 - 2¹ = 20345233304423 is a prime.

It is a super-2 number, since 2×20345233304425² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20345233304423) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 406904666064 + ... + 406904666113.

Almost surely, 2^{20345233304425} is an apocalyptic number.

20345233304425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20345233304425 is a deficient number, since it is larger than the sum of its proper divisors (4882855993093).

20345233304425 is an equidigital number, since it uses as much as digits as its factorization.

20345233304425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 813809332187 (or 813809332182 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 40.

Adding to 20345233304425 its reverse (52440333254302), we get a palindrome (72785566558727).

The spelling of 20345233304425 in words is "twenty trillion, three hundred forty-five billion, two hundred thirty-three million, three hundred four thousand, four hundred twenty-five".