18520411315 has 16 divisors (see below), whose sum is σ = 25541326080. Its totient is φ = 12628758240.

The previous prime is 18520411289. The next prime is 18520411331. The reversal of 18520411315 is 51311402581.

It is not a de Polignac number, because 18520411315 - 2¹⁷ = 18520280243 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1471821 + ... + 1484350.

It is an arithmetic number, because the mean of its divisors is an integer number (1596332880).

Almost surely, 2^18520411315 is an apocalyptic number.

18520411315 is a deficient number, since it is larger than the sum of its proper divisors (7020914765).

18520411315 is a wasteful number, since it uses less digits than its factorization.

18520411315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2956362.

The product of its (nonzero) digits is 4800, while the sum is 31.

Adding to 18520411315 its reverse (51311402581), we get a palindrome (69831813896).

The spelling of 18520411315 in words is "eighteen billion, five hundred twenty million, four hundred eleven thousand, three hundred fifteen".