20118007837 has 2 divisors, whose sum is σ = 20118007838. Its totient is φ = 20118007836.

The previous prime is 20118007831. The next prime is 20118007841. The reversal of 20118007837 is 73870081102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14993022916 + 5124984921 = 122446^2 + 71589^2 .

It is a cyclic number.

It is not a de Polignac number, because 20118007837 - 2²⁷ = 19983790109 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20118007796 and 20118007805.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20118007831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10059003918 + 10059003919.

It is an arithmetic number, because the mean of its divisors is an integer number (10059003919).

Almost surely, 2^20118007837 is an apocalyptic number.

It is an amenable number.

20118007837 is a deficient number, since it is larger than the sum of its proper divisors (1).

20118007837 is an equidigital number, since it uses as much as digits as its factorization.

20118007837 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18816, while the sum is 37.

Adding to 20118007837 its reverse (73870081102), we get a palindrome (93988088939).

The spelling of 20118007837 in words is "twenty billion, one hundred eighteen million, seven thousand, eight hundred thirty-seven".