18020032765 has 8 divisors (see below), whose sum is σ = 24713187840. Its totient is φ = 12356593872.

The previous prime is 18020032757. The next prime is 18020032777. The reversal of 18020032765 is 56723002081.

It is a happy number.

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

It is not a de Polignac number, because 18020032765 - 2³ = 18020032757 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18020032765.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 257429005 + ... + 257429074.

It is an arithmetic number, because the mean of its divisors is an integer number (3089148480).

Almost surely, 2^18020032765 is an apocalyptic number.

It is an amenable number.

18020032765 is a deficient number, since it is larger than the sum of its proper divisors (6693155075).

18020032765 is an equidigital number, since it uses as much as digits as its factorization.

18020032765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514858091.

The product of its (nonzero) digits is 20160, while the sum is 34.

The spelling of 18020032765 in words is "eighteen billion, twenty million, thirty-two thousand, seven hundred sixty-five".