20233111000181 has 2 divisors, whose sum is σ = 20233111000182. Its totient is φ = 20233111000180.

The previous prime is 20233111000147. The next prime is 20233111000231. The reversal of 20233111000181 is 18100011133202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16590624239281 + 3642486760900 = 4073159^2 + 1908530^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20233111000181 is a prime.

It is a super-2 number, since 2×20233111000181² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20233111000121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10116555500090 + 10116555500091.

It is an arithmetic number, because the mean of its divisors is an integer number (10116555500091).

Almost surely, 2^{20233111000181} is an apocalyptic number.

It is an amenable number.

20233111000181 is a deficient number, since it is larger than the sum of its proper divisors (1).

20233111000181 is an equidigital number, since it uses as much as digits as its factorization.

20233111000181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 23.

Adding to 20233111000181 its reverse (18100011133202), we get a palindrome (38333122133383).

The spelling of 20233111000181 in words is "twenty trillion, two hundred thirty-three billion, one hundred eleven million, one hundred eighty-one", and thus it is an aban number.