20122109873 has 2 divisors, whose sum is σ = 20122109874. Its totient is φ = 20122109872.

The previous prime is 20122109869. The next prime is 20122109879. The reversal of 20122109873 is 37890122102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20116316224 + 5793649 = 141832^2 + 2407^2 .

It is a cyclic number.

It is not a de Polignac number, because 20122109873 - 2² = 20122109869 is a prime.

It is a super-2 number, since 2×20122109873² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20122109879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10061054936 + 10061054937.

It is an arithmetic number, because the mean of its divisors is an integer number (10061054937).

Almost surely, 2^20122109873 is an apocalyptic number.

It is an amenable number.

20122109873 is a deficient number, since it is larger than the sum of its proper divisors (1).

20122109873 is an equidigital number, since it uses as much as digits as its factorization.

20122109873 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 35.

The spelling of 20122109873 in words is "twenty billion, one hundred twenty-two million, one hundred nine thousand, eight hundred seventy-three".