20100020100973 has 2 divisors, whose sum is σ = 20100020100974. Its totient is φ = 20100020100972.

The previous prime is 20100020100949. The next prime is 20100020101019. The reversal of 20100020100973 is 37900102000102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17572168134889 + 2527851966084 = 4191917^2 + 1589922^2 .

It is a cyclic number.

It is not a de Polignac number, because 20100020100973 - 2³⁷ = 19962581147501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20100020104973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10050010050486 + 10050010050487.

It is an arithmetic number, because the mean of its divisors is an integer number (10050010050487).

Almost surely, 2^{20100020100973} is an apocalyptic number.

It is an amenable number.

20100020100973 is a deficient number, since it is larger than the sum of its proper divisors (1).

20100020100973 is an equidigital number, since it uses as much as digits as its factorization.

20100020100973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756, while the sum is 25.

The spelling of 20100020100973 in words is "twenty trillion, one hundred billion, twenty million, one hundred thousand, nine hundred seventy-three".