20045435545 has 8 divisors (see below), whose sum is σ = 24508381896. Its totient is φ = 15733775616.

The previous prime is 20045435513. The next prime is 20045435549. The reversal of 20045435545 is 54553454002.

It can be written as a sum of positive squares in 4 ways, for example, as 9364626441 + 10680809104 = 96771^2 + 103348^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20045435545 - 2⁵ = 20045435513 is a prime.

It is a super-3 number, since 3×20045435545³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20045435549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37821312 + ... + 37821841.

It is an arithmetic number, because the mean of its divisors is an integer number (3063547737).

Almost surely, 2^20045435545 is an apocalyptic number.

It is an amenable number.

20045435545 is a deficient number, since it is larger than the sum of its proper divisors (4462946351).

20045435545 is an equidigital number, since it uses as much as digits as its factorization.

20045435545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75643211.

The product of its (nonzero) digits is 240000, while the sum is 37.

Adding to 20045435545 its reverse (54553454002), we get a palindrome (74598889547).

The spelling of 20045435545 in words is "twenty billion, forty-five million, four hundred thirty-five thousand, five hundred forty-five".