20665293037 has 2 divisors, whose sum is σ = 20665293038. Its totient is φ = 20665293036.

The previous prime is 20665292971. The next prime is 20665293043. The reversal of 20665293037 is 73039256602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17299088676 + 3366204361 = 131526^2 + 58019^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20665293037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20665292984 and 20665293002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20665293097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10332646518 + 10332646519.

It is an arithmetic number, because the mean of its divisors is an integer number (10332646519).

Almost surely, 2^20665293037 is an apocalyptic number.

It is an amenable number.

20665293037 is a deficient number, since it is larger than the sum of its proper divisors (1).

20665293037 is an equidigital number, since it uses as much as digits as its factorization.

20665293037 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 408240, while the sum is 43.

The spelling of 20665293037 in words is "twenty billion, six hundred sixty-five million, two hundred ninety-three thousand, thirty-seven".