20065113553 has 4 divisors (see below), whose sum is σ = 20077137460. Its totient is φ = 20053089648.

The previous prime is 20065113493. The next prime is 20065113643. The reversal of 20065113553 is 35531156002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 35531156002 = 2 ⋅17765578001.

It can be written as a sum of positive squares in 2 ways, for example, as 15028798464 + 5036315089 = 122592^2 + 70967^2 .

It is a cyclic number.

It is not a de Polignac number, because 20065113553 - 2¹⁷ = 20064982481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20065113853) 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, 6009450 + ... + 6012787.

It is an arithmetic number, because the mean of its divisors is an integer number (5019284365).

Almost surely, 2^20065113553 is an apocalyptic number.

It is an amenable number.

20065113553 is a deficient number, since it is larger than the sum of its proper divisors (12023907).

20065113553 is a wasteful number, since it uses less digits than its factorization.

20065113553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12023906.

The product of its (nonzero) digits is 13500, while the sum is 31.

Adding to 20065113553 its reverse (35531156002), we get a palindrome (55596269555).

The spelling of 20065113553 in words is "twenty billion, sixty-five million, one hundred thirteen thousand, five hundred fifty-three".