81203233230218 has 16 divisors (see below), whose sum is σ = 132878297638080. Its totient is φ = 36910482885600.

The previous prime is 81203233230211. The next prime is 81203233230263.

81203233230218 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (81203233230211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7557323 + ... + 14816193.

It is an arithmetic number, because the mean of its divisors is an integer number (8304893602380).

Almost surely, 2^{81203233230218} is an apocalyptic number.

81203233230218 is a deficient number, since it is larger than the sum of its proper divisors (51675064407862).

81203233230218 is a wasteful number, since it uses less digits than its factorization.

81203233230218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7767373.

The product of its (nonzero) digits is 82944, while the sum is 38.

The spelling of 81203233230218 in words is "eighty-one trillion, two hundred three billion, two hundred thirty-three million, two hundred thirty thousand, two hundred eighteen".