20325338513 has 4 divisors (see below), whose sum is σ = 20798020848. Its totient is φ = 19852656180.

The previous prime is 20325338507. The next prime is 20325338543. The reversal of 20325338513 is 31583352302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31583352302 = 2 ⋅15791676151.

It is a cyclic number.

It is not a de Polignac number, because 20325338513 - 2³⁴ = 3145469329 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20325338543) 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, 236341103 + ... + 236341188.

It is an arithmetic number, because the mean of its divisors is an integer number (5199505212).

Almost surely, 2^20325338513 is an apocalyptic number.

It is an amenable number.

20325338513 is a deficient number, since it is larger than the sum of its proper divisors (472682335).

20325338513 is an equidigital number, since it uses as much as digits as its factorization.

20325338513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472682334.

The product of its (nonzero) digits is 64800, while the sum is 35.

The spelling of 20325338513 in words is "twenty billion, three hundred twenty-five million, three hundred thirty-eight thousand, five hundred thirteen".