20545051511305 has 8 divisors (see below), whose sum is σ = 25951644014400. Its totient is φ = 15570986408496.

The previous prime is 20545051511293. The next prime is 20545051511333. The reversal of 20545051511305 is 50311515054502.

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 20545051511305 - 2³⁷ = 20407612557833 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108131849965 + ... + 108131850154.

It is an arithmetic number, because the mean of its divisors is an integer number (3243955501800).

Almost surely, 2^{20545051511305} is an apocalyptic number.

It is an amenable number.

20545051511305 is a deficient number, since it is larger than the sum of its proper divisors (5406592503095).

20545051511305 is a wasteful number, since it uses less digits than its factorization.

20545051511305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216263700143.

The product of its (nonzero) digits is 75000, while the sum is 37.

Adding to 20545051511305 its reverse (50311515054502), we get a palindrome (70856566565807).

The spelling of 20545051511305 in words is "twenty trillion, five hundred forty-five billion, fifty-one million, five hundred eleven thousand, three hundred five".