20108100638803 has 2 divisors, whose sum is σ = 20108100638804. Its totient is φ = 20108100638802.

The previous prime is 20108100638783. The next prime is 20108100638867. The reversal of 20108100638803 is 30883600180102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20108100638803 - 2²¹ = 20108098541651 is a prime.

It is a super-2 number, since 2×20108100638803² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20108100638203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10054050319401 + 10054050319402.

It is an arithmetic number, because the mean of its divisors is an integer number (10054050319402).

Almost surely, 2^{20108100638803} is an apocalyptic number.

20108100638803 is a deficient number, since it is larger than the sum of its proper divisors (1).

20108100638803 is an equidigital number, since it uses as much as digits as its factorization.

20108100638803 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 55296, while the sum is 40.

The spelling of 20108100638803 in words is "twenty trillion, one hundred eight billion, one hundred million, six hundred thirty-eight thousand, eight hundred three".