18007976825 has 6 divisors (see below), whose sum is σ = 22329891294. Its totient is φ = 14406381440.

The previous prime is 18007976803. The next prime is 18007976939. The reversal of 18007976825 is 52867970081.

It can be written as a sum of positive squares in 3 ways, for example, as 93760489 + 17914216336 = 9683^2 + 133844^2 .

It is not a de Polignac number, because 18007976825 - 2¹⁰ = 18007975801 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 360159512 + ... + 360159561.

It is an arithmetic number, because the mean of its divisors is an integer number (3721648549).

Almost surely, 2^18007976825 is an apocalyptic number.

It is an amenable number.

18007976825 is a deficient number, since it is larger than the sum of its proper divisors (4321914469).

18007976825 is an equidigital number, since it uses as much as digits as its factorization.

18007976825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720319083 (or 720319078 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 53.

The spelling of 18007976825 in words is "eighteen billion, seven million, nine hundred seventy-six thousand, eight hundred twenty-five".