18363816725 has 6 divisors (see below), whose sum is σ = 22771132770. Its totient is φ = 14691053360.

The previous prime is 18363816689. The next prime is 18363816761. The reversal of 18363816725 is 52761836381.

It is an interprime number because it is at equal distance from previous prime (18363816689) and next prime (18363816761).

It can be written as a sum of positive squares in 3 ways, for example, as 2758560484 + 15605256241 = 52522^2 + 124921^2 .

It is not a de Polignac number, because 18363816725 - 2⁶ = 18363816661 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent 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, 367276310 + ... + 367276359.

It is an arithmetic number, because the mean of its divisors is an integer number (3795188795).

Almost surely, 2^18363816725 is an apocalyptic number.

It is an amenable number.

18363816725 is a deficient number, since it is larger than the sum of its proper divisors (4407316045).

18363816725 is an equidigital number, since it uses as much as digits as its factorization.

18363816725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 734552679 (or 734552674 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 50.

The spelling of 18363816725 in words is "eighteen billion, three hundred sixty-three million, eight hundred sixteen thousand, seven hundred twenty-five".