20109120853 has 2 divisors, whose sum is σ = 20109120854. Its totient is φ = 20109120852.

The previous prime is 20109120851. The next prime is 20109120919. The reversal of 20109120853 is 35802190102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17609820804 + 2499300049 = 132702^2 + 49993^2 .

It is a cyclic number.

It is not a de Polignac number, because 20109120853 - 2¹ = 20109120851 is a prime.

Together with 20109120851, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20109120851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10054560426 + 10054560427.

It is an arithmetic number, because the mean of its divisors is an integer number (10054560427).

Almost surely, 2^20109120853 is an apocalyptic number.

It is an amenable number.

20109120853 is a deficient number, since it is larger than the sum of its proper divisors (1).

20109120853 is an equidigital number, since it uses as much as digits as its factorization.

20109120853 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 31.

The spelling of 20109120853 in words is "twenty billion, one hundred nine million, one hundred twenty thousand, eight hundred fifty-three".