81330203318 has 64 divisors (see below), whose sum is σ = 151819895808. Its totient is φ = 31818268800.

The previous prime is 81330203309. The next prime is 81330203327.

81330203318 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (81330203309) and next prime (81330203327).

It is a super-2 number, since 2×81330203318² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6231896 + ... + 6244932.

It is an arithmetic number, because the mean of its divisors is an integer number (2372185872).

Almost surely, 2^81330203318 is an apocalyptic number.

81330203318 is a deficient number, since it is larger than the sum of its proper divisors (70489692490).

81330203318 is a wasteful number, since it uses less digits than its factorization.

81330203318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13437.

The product of its (nonzero) digits is 10368, while the sum is 32.

The spelling of 81330203318 in words is "eighty-one billion, three hundred thirty million, two hundred three thousand, three hundred eighteen".