18520601473249 has 4 divisors (see below), whose sum is σ = 18520988633136. Its totient is φ = 18520214313364.

The previous prime is 18520601473183. The next prime is 18520601473259. The reversal of 18520601473249 is 94237410602581.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18520601473249 - 2¹⁹ = 18520600948961 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18520601473196 and 18520601473205.

It is not an unprimeable number, because it can be changed into a prime (18520601473259) 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, 193508179 + ... + 193603864.

It is an arithmetic number, because the mean of its divisors is an integer number (4630247158284).

It is a 1-persistent number, because it is pandigital, but 2⋅18520601473249 = 37041202946498 is not.

Almost surely, 2^{18520601473249} is an apocalyptic number.

It is an amenable number.

18520601473249 is a deficient number, since it is larger than the sum of its proper divisors (387159887).

18520601473249 is an equidigital number, since it uses as much as digits as its factorization.

18520601473249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387159886.

The product of its (nonzero) digits is 2903040, while the sum is 52.

The spelling of 18520601473249 in words is "eighteen trillion, five hundred twenty billion, six hundred one million, four hundred seventy-three thousand, two hundred forty-nine".