20745100237 has 2 divisors, whose sum is σ = 20745100238. Its totient is φ = 20745100236.

The previous prime is 20745100199. The next prime is 20745100241. The reversal of 20745100237 is 73200154702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13949735881 + 6795364356 = 118109^2 + 82434^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20745100237 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20745100199 and 20745100208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20745190237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10372550118 + 10372550119.

It is an arithmetic number, because the mean of its divisors is an integer number (10372550119).

Almost surely, 2^20745100237 is an apocalyptic number.

It is an amenable number.

20745100237 is a deficient number, since it is larger than the sum of its proper divisors (1).

20745100237 is an equidigital number, since it uses as much as digits as its factorization.

20745100237 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11760, while the sum is 31.

Adding to 20745100237 its reverse (73200154702), we get a palindrome (93945254939).

The spelling of 20745100237 in words is "twenty billion, seven hundred forty-five million, one hundred thousand, two hundred thirty-seven".