18051785793 has 20 divisors (see below), whose sum is σ = 26970737860. Its totient is φ = 12032520192.

The previous prime is 18051785783. The next prime is 18051785797. The reversal of 18051785793 is 39758715081.

It is a happy number.

18051785793 is a `hidden beast` number, since 18 + 0 + 51 + 7 + 8 + 579 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 8713849104 + 9337936689 = 93348^2 + 96633^2 .

It is not a de Polignac number, because 18051785793 - 2⁸ = 18051785537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18051785797) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 595713 + ... + 625281.

It is an arithmetic number, because the mean of its divisors is an integer number (1348536893).

Almost surely, 2^18051785793 is an apocalyptic number.

It is an amenable number.

18051785793 is a deficient number, since it is larger than the sum of its proper divisors (8918952067).

18051785793 is an equidigital number, since it uses as much as digits as its factorization.

18051785793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37118 (or 37109 counting only the distinct ones).

The product of its (nonzero) digits is 2116800, while the sum is 54.

The spelling of 18051785793 in words is "eighteen billion, fifty-one million, seven hundred eighty-five thousand, seven hundred ninety-three".