18016702281 has 6 divisors (see below), whose sum is σ = 26024125530. Its totient is φ = 12011134848.

The previous prime is 18016702279. The next prime is 18016702307. The reversal of 18016702281 is 18220761081.

It can be written as a sum of positive squares in only one way, i.e., 11037603600 + 6979098681 = 105060^2 + 83541^2 .

It is not a de Polignac number, because 18016702281 - 2¹ = 18016702279 is a prime.

It is a super-2 number, since 2×18016702281² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18016702211) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1000927896 + ... + 1000927913.

It is an arithmetic number, because the mean of its divisors is an integer number (4337354255).

Almost surely, 2^18016702281 is an apocalyptic number.

It is an amenable number.

18016702281 is a deficient number, since it is larger than the sum of its proper divisors (8007423249).

18016702281 is a wasteful number, since it uses less digits than its factorization.

18016702281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2001855815 (or 2001855812 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 36.

The spelling of 18016702281 in words is "eighteen billion, sixteen million, seven hundred two thousand, two hundred eighty-one".