20745133027 has 4 divisors (see below), whose sum is σ = 21305812336. Its totient is φ = 20184453720.

The previous prime is 20745132917. The next prime is 20745133049. The reversal of 20745133027 is 72033154702.

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

It is a cyclic number.

It is not a de Polignac number, because 20745133027 - 2¹¹ = 20745130979 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20745132983 and 20745133001.

It is not an unprimeable number, because it can be changed into a prime (20745133427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 280339599 + ... + 280339672.

It is an arithmetic number, because the mean of its divisors is an integer number (5326453084).

Almost surely, 2^20745133027 is an apocalyptic number.

20745133027 is a deficient number, since it is larger than the sum of its proper divisors (560679309).

20745133027 is an equidigital number, since it uses as much as digits as its factorization.

20745133027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560679308.

The product of its (nonzero) digits is 35280, while the sum is 34.

Adding to 20745133027 its reverse (72033154702), we get a palindrome (92778287729).

The spelling of 20745133027 in words is "twenty billion, seven hundred forty-five million, one hundred thirty-three thousand, twenty-seven".