20004304425437 has 4 divisors (see below), whose sum is σ = 20030317825980. Its totient is φ = 19978291024896.

The previous prime is 20004304425421. The next prime is 20004304425493. The reversal of 20004304425437 is 73452440340002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15884098656196 + 4120205769241 = 3985486^2 + 2029829^2 .

It is a cyclic number.

It is not a de Polignac number, because 20004304425437 - 2⁴ = 20004304425421 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20004304425437.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20004304422437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13006699118 + ... + 13006700655.

It is an arithmetic number, because the mean of its divisors is an integer number (5007579456495).

Almost surely, 2^{20004304425437} is an apocalyptic number.

It is an amenable number.

20004304425437 is a deficient number, since it is larger than the sum of its proper divisors (26013400543).

20004304425437 is an equidigital number, since it uses as much as digits as its factorization.

20004304425437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26013400542.

The product of its (nonzero) digits is 322560, while the sum is 38.

Adding to 20004304425437 its reverse (73452440340002), we get a palindrome (93456744765439).

The spelling of 20004304425437 in words is "twenty trillion, four billion, three hundred four million, four hundred twenty-five thousand, four hundred thirty-seven".