81023032018 has 8 divisors (see below), whose sum is σ = 121568726412. Its totient is φ = 40500123216.

The previous prime is 81023031979. The next prime is 81023032031.

81023032018 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 70265815929 + 10757216089 = 265077^2 + 103717^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5687505 + ... + 5701732.

Almost surely, 2^81023032018 is an apocalyptic number.

81023032018 is a deficient number, since it is larger than the sum of its proper divisors (40545694394).

81023032018 is a wasteful number, since it uses less digits than its factorization.

81023032018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11392796.

The product of its (nonzero) digits is 2304, while the sum is 28.

It can be divided in two parts, 810230 and 32018, that added together give a palindrome (842248).

The spelling of 81023032018 in words is "eighty-one billion, twenty-three million, thirty-two thousand, eighteen".