18201625793 has 4 divisors (see below), whose sum is σ = 19601750868. Its totient is φ = 16801500720.

The previous prime is 18201625781. The next prime is 18201625829. The reversal of 18201625793 is 39752610281.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 937768129 + 17263857664 = 30623^2 + 131392^2 .

It is a cyclic number.

It is not a de Polignac number, because 18201625793 - 2⁴ = 18201625777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18201625723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 700062518 + ... + 700062543.

It is an arithmetic number, because the mean of its divisors is an integer number (4900437717).

Almost surely, 2^18201625793 is an apocalyptic number.

18201625793 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

18201625793 is a deficient number, since it is larger than the sum of its proper divisors (1400125075).

18201625793 is a wasteful number, since it uses less digits than its factorization.

18201625793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1400125074.

The product of its (nonzero) digits is 181440, while the sum is 44.

The spelling of 18201625793 in words is "eighteen billion, two hundred one million, six hundred twenty-five thousand, seven hundred ninety-three".