18002062081 has 8 divisors (see below), whose sum is σ = 18169160040. Its totient is φ = 17835481728.

The previous prime is 18002062063. The next prime is 18002062109. The reversal of 18002062081 is 18026020081.

It can be written as a sum of positive squares in 4 ways, for example, as 4443555600 + 13558506481 = 66660^2 + 116441^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 18002062081 - 2⁹ = 18002061569 is a prime.

It is a super-2 number, since 2×18002062081² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18002062021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59346 + ... + 198811.

It is an arithmetic number, because the mean of its divisors is an integer number (2271145005).

Almost surely, 2^18002062081 is an apocalyptic number.

It is an amenable number.

18002062081 is a deficient number, since it is larger than the sum of its proper divisors (167097959).

18002062081 is a wasteful number, since it uses less digits than its factorization.

18002062081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258803.

The product of its (nonzero) digits is 1536, while the sum is 28.

The spelling of 18002062081 in words is "eighteen billion, two million, sixty-two thousand, eighty-one".