18028018697 has 8 divisors (see below), whose sum is σ = 19422855816. Its totient is φ = 16634333952.

The previous prime is 18028018663. The next prime is 18028018709. The reversal of 18028018697 is 79681082081.

It can be written as a sum of positive squares in 4 ways, for example, as 745235401 + 17282783296 = 27299^2 + 131464^2 .

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 18028018697 - 2¹⁰ = 18028017673 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18028078697) 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, 255458 + ... + 318299.

It is an arithmetic number, because the mean of its divisors is an integer number (2427856977).

Almost surely, 2^18028018697 is an apocalyptic number.

It is an amenable number.

18028018697 is a deficient number, since it is larger than the sum of its proper divisors (1394837119).

18028018697 is a wasteful number, since it uses less digits than its factorization.

18028018697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576187.

The product of its (nonzero) digits is 387072, while the sum is 50.

The spelling of 18028018697 in words is "eighteen billion, twenty-eight million, eighteen thousand, six hundred ninety-seven".