20045342533 has 4 divisors (see below), whose sum is σ = 20286852768. Its totient is φ = 19803832300.

The previous prime is 20045342521. The next prime is 20045342591. The reversal of 20045342533 is 33524354002.

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.

It is a cyclic number.

It is not a de Polignac number, because 20045342533 - 2⁵ = 20045342501 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20045342495 and 20045342504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20045342833) 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, 120754993 + ... + 120755158.

It is an arithmetic number, because the mean of its divisors is an integer number (5071713192).

Almost surely, 2^20045342533 is an apocalyptic number.

It is an amenable number.

20045342533 is a deficient number, since it is larger than the sum of its proper divisors (241510235).

20045342533 is an equidigital number, since it uses as much as digits as its factorization.

20045342533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241510234.

The product of its (nonzero) digits is 43200, while the sum is 31.

Adding to 20045342533 its reverse (33524354002), we get a palindrome (53569696535).

The spelling of 20045342533 in words is "twenty billion, forty-five million, three hundred forty-two thousand, five hundred thirty-three".