20133455737 has 2 divisors, whose sum is σ = 20133455738. Its totient is φ = 20133455736.

The previous prime is 20133455717. The next prime is 20133455779. The reversal of 20133455737 is 73755433102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18490288441 + 1643167296 = 135979^2 + 40536^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20133455737 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20133455737.

It is not a weakly prime, because it can be changed into another prime (20133455717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10066727868 + 10066727869.

It is an arithmetic number, because the mean of its divisors is an integer number (10066727869).

Almost surely, 2^20133455737 is an apocalyptic number.

It is an amenable number.

20133455737 is a deficient number, since it is larger than the sum of its proper divisors (1).

20133455737 is an equidigital number, since it uses as much as digits as its factorization.

20133455737 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 264600, while the sum is 40.

Adding to 20133455737 its reverse (73755433102), we get a palindrome (93888888839).

The spelling of 20133455737 in words is "twenty billion, one hundred thirty-three million, four hundred fifty-five thousand, seven hundred thirty-seven".