20126336671937 has 2 divisors, whose sum is σ = 20126336671938. Its totient is φ = 20126336671936.

The previous prime is 20126336671927. The next prime is 20126336671957. The reversal of 20126336671937 is 73917663362102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19946620874896 + 179715797041 = 4466164^2 + 423929^2 .

It is a cyclic number.

It is not a de Polignac number, because 20126336671937 - 2¹⁸ = 20126336409793 is a prime.

It is a super-2 number, since 2×20126336671937² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20126336671927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10063168335968 + 10063168335969.

It is an arithmetic number, because the mean of its divisors is an integer number (10063168335969).

Almost surely, 2^{20126336671937} is an apocalyptic number.

It is an amenable number.

20126336671937 is a deficient number, since it is larger than the sum of its proper divisors (1).

20126336671937 is an equidigital number, since it uses as much as digits as its factorization.

20126336671937 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10287648, while the sum is 56.

The spelling of 20126336671937 in words is "twenty trillion, one hundred twenty-six billion, three hundred thirty-six million, six hundred seventy-one thousand, nine hundred thirty-seven".