18329947245 has 20 divisors (see below), whose sum is σ = 32858128380. Its totient is φ = 9775971648.

The previous prime is 18329947217. The next prime is 18329947277. The reversal of 18329947245 is 54274992381.

18329947245 is a `hidden beast` number, since 1 + 83 + 2 + 99 + 472 + 4 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 12252497481 + 6077449764 = 110691^2 + 77958^2 .

It is not a de Polignac number, because 18329947245 - 2⁷ = 18329947117 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 18329947191 and 18329947200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 22629160 + ... + 22629969.

It is an arithmetic number, because the mean of its divisors is an integer number (1642906419).

Almost surely, 2^18329947245 is an apocalyptic number.

18329947245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18329947245 is a deficient number, since it is larger than the sum of its proper divisors (14528181135).

18329947245 is an equidigital number, since it uses as much as digits as its factorization.

18329947245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45259146 (or 45259137 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 54.

The spelling of 18329947245 in words is "eighteen billion, three hundred twenty-nine million, nine hundred forty-seven thousand, two hundred forty-five".