20645054342037 has 12 divisors (see below), whose sum is σ = 29826679245324. Its totient is φ = 13760579471040.

The previous prime is 20645054341973. The next prime is 20645054342047. The reversal of 20645054342037 is 73024345054602.

20645054342037 is a `hidden beast` number, since 2 + 0 + 6 + 4 + 5 + 0 + 5 + 434 + 203 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 15235704050436 + 5409350291601 = 3903294^2 + 2325801^2 .

It is not a de Polignac number, because 20645054342037 - 2⁶ = 20645054341973 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 20645054341983 and 20645054342001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20645054342047) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 232460664 + ... + 232549457.

It is an arithmetic number, because the mean of its divisors is an integer number (2485556603777).

Almost surely, 2^{20645054342037} is an apocalyptic number.

It is an amenable number.

20645054342037 is a deficient number, since it is larger than the sum of its proper divisors (9181624903287).

20645054342037 is a wasteful number, since it uses less digits than its factorization.

20645054342037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465015060 (or 465015057 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 45.

Adding to 20645054342037 its reverse (73024345054602), we get a palindrome (93669399396639).

The spelling of 20645054342037 in words is "twenty trillion, six hundred forty-five billion, fifty-four million, three hundred forty-two thousand, thirty-seven".