18215903475419 has 4 divisors (see below), whose sum is σ = 19617126819696. Its totient is φ = 16814680131144.

The previous prime is 18215903475391. The next prime is 18215903475491. The reversal of 18215903475419 is 91457430951281.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18215903475419 - 2⁸ = 18215903475163 is a prime.

It is a super-2 number, since 2×18215903475419² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18215903475499) 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, 700611672119 + ... + 700611672144.

It is an arithmetic number, because the mean of its divisors is an integer number (4904281704924).

Almost surely, 2^{18215903475419} is an apocalyptic number.

18215903475419 is a deficient number, since it is larger than the sum of its proper divisors (1401223344277).

18215903475419 is a wasteful number, since it uses less digits than its factorization.

18215903475419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1401223344276.

The product of its (nonzero) digits is 10886400, while the sum is 59.

The spelling of 18215903475419 in words is "eighteen trillion, two hundred fifteen billion, nine hundred three million, four hundred seventy-five thousand, four hundred nineteen".