20455161140053 has 4 divisors (see below), whose sum is σ = 20455382769228. Its totient is φ = 20454939510880.

The previous prime is 20455161140003. The next prime is 20455161140077. The reversal of 20455161140053 is 35004116155402.

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 2160362013489 + 18294799126564 = 1469817^2 + 4277242^2 .

It is a cyclic number.

It is not a de Polignac number, because 20455161140053 - 2³⁷ = 20317722186581 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20455161139994 and 20455161140021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20455161140003) 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, 110676088 + ... + 110860753.

It is an arithmetic number, because the mean of its divisors is an integer number (5113845692307).

Almost surely, 2^{20455161140053} is an apocalyptic number.

It is an amenable number.

20455161140053 is a deficient number, since it is larger than the sum of its proper divisors (221629175).

20455161140053 is an equidigital number, since it uses as much as digits as its factorization.

20455161140053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221629174.

The product of its (nonzero) digits is 72000, while the sum is 37.

Adding to 20455161140053 its reverse (35004116155402), we get a palindrome (55459277295455).

The spelling of 20455161140053 in words is "twenty trillion, four hundred fifty-five billion, one hundred sixty-one million, one hundred forty thousand, fifty-three".