20107688540507 has 2 divisors, whose sum is σ = 20107688540508. Its totient is φ = 20107688540506.

The previous prime is 20107688540431. The next prime is 20107688540593. The reversal of 20107688540507 is 70504588670102.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20107688540507 is a prime.

It is not a weakly prime, because it can be changed into another prime (20107688530507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10053844270253 + 10053844270254.

It is an arithmetic number, because the mean of its divisors is an integer number (10053844270254).

Almost surely, 2^{20107688540507} is an apocalyptic number.

20107688540507 is a deficient number, since it is larger than the sum of its proper divisors (1).

20107688540507 is an equidigital number, since it uses as much as digits as its factorization.

20107688540507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3763200, while the sum is 53.

The spelling of 20107688540507 in words is "twenty trillion, one hundred seven billion, six hundred eighty-eight million, five hundred forty thousand, five hundred seven".