20351645040545 has 96 divisors (see below), whose sum is σ = 31332688240896. Its totient is φ = 12574723392000.

The previous prime is 20351645040437. The next prime is 20351645040547. The reversal of 20351645040545 is 54504054615302.

It is not a de Polignac number, because 20351645040545 - 2²⁰ = 20351643991969 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20351645040496 and 20351645040505.

It is not an unprimeable number, because it can be changed into a prime (20351645040547) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 22394102 + ... + 23285168.

It is an arithmetic number, because the mean of its divisors is an integer number (326382169176).

Almost surely, 2^{20351645040545} is an apocalyptic number.

It is an amenable number.

20351645040545 is a deficient number, since it is larger than the sum of its proper divisors (10981043200351).

20351645040545 is a wasteful number, since it uses less digits than its factorization.

20351645040545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 891271 (or 891264 counting only the distinct ones).

The product of its (nonzero) digits is 1440000, while the sum is 44.

Adding to 20351645040545 its reverse (54504054615302), we get a palindrome (74855699655847).

The spelling of 20351645040545 in words is "twenty trillion, three hundred fifty-one billion, six hundred forty-five million, forty thousand, five hundred forty-five".