18853357825 has 6 divisors (see below), whose sum is σ = 23378163734. Its totient is φ = 15082686240.

The previous prime is 18853357819. The next prime is 18853357841. The reversal of 18853357825 is 52875335881.

It can be written as a sum of positive squares in 3 ways, for example, as 6130420209 + 12722937616 = 78297^2 + 112796^2 .

It is not a de Polignac number, because 18853357825 - 2²⁵ = 18819803393 is a prime.

It is a Duffinian 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 5 ways as a sum of consecutive naturals, for example, 377067132 + ... + 377067181.

Almost surely, 2^18853357825 is an apocalyptic number.

It is an amenable number.

18853357825 is a deficient number, since it is larger than the sum of its proper divisors (4524805909).

18853357825 is an equidigital number, since it uses as much as digits as its factorization.

18853357825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 754134323 (or 754134318 counting only the distinct ones).

The product of its digits is 8064000, while the sum is 55.

The spelling of 18853357825 in words is "eighteen billion, eight hundred fifty-three million, three hundred fifty-seven thousand, eight hundred twenty-five".