20000110981 has 2 divisors, whose sum is σ = 20000110982. Its totient is φ = 20000110980.

The previous prime is 20000110951. The next prime is 20000110987. The reversal of 20000110981 is 18901100002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19062220356 + 937890625 = 138066^2 + 30625^2 .

It is a cyclic number.

It is not a de Polignac number, because 20000110981 - 2²⁵ = 19966556549 is a prime.

It is a super-2 number, since 2×20000110981² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20000110987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000055490 + 10000055491.

It is an arithmetic number, because the mean of its divisors is an integer number (10000055491).

Almost surely, 2^20000110981 is an apocalyptic number.

It is an amenable number.

20000110981 is a deficient number, since it is larger than the sum of its proper divisors (1).

20000110981 is an equidigital number, since it uses as much as digits as its factorization.

20000110981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 22.

Adding to 20000110981 its reverse (18901100002), we get a palindrome (38901210983).

The spelling of 20000110981 in words is "twenty billion, one hundred ten thousand, nine hundred eighty-one".