20753134165 has 4 divisors (see below), whose sum is σ = 24903761004. Its totient is φ = 16602507328.

The previous prime is 20753134151. The next prime is 20753134211. The reversal of 20753134165 is 56143135702.

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 13197873924 + 7555260241 = 114882^2 + 86921^2 .

It is a cyclic number.

It is not a de Polignac number, because 20753134165 - 2¹¹ = 20753132117 is a prime.

It is a super-3 number, since 3×20753134165³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2075313412 + ... + 2075313421.

It is an arithmetic number, because the mean of its divisors is an integer number (6225940251).

Almost surely, 2^20753134165 is an apocalyptic number.

It is an amenable number.

20753134165 is a deficient number, since it is larger than the sum of its proper divisors (4150626839).

20753134165 is an equidigital number, since it uses as much as digits as its factorization.

20753134165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4150626838.

The product of its (nonzero) digits is 75600, while the sum is 37.

Adding to 20753134165 its reverse (56143135702), we get a palindrome (76896269867).

The spelling of 20753134165 in words is "twenty billion, seven hundred fifty-three million, one hundred thirty-four thousand, one hundred sixty-five".