18215302193 has 4 divisors (see below), whose sum is σ = 19871238768. Its totient is φ = 16559365620.

The previous prime is 18215302169. The next prime is 18215302199. The reversal of 18215302193 is 39120351281.

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 18215302193 - 2⁶ = 18215302129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18215302199) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 827968271 + ... + 827968292.

It is an arithmetic number, because the mean of its divisors is an integer number (4967809692).

Almost surely, 2^18215302193 is an apocalyptic number.

It is an amenable number.

18215302193 is a deficient number, since it is larger than the sum of its proper divisors (1655936575).

18215302193 is a wasteful number, since it uses less digits than its factorization.

18215302193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1655936574.

The product of its (nonzero) digits is 12960, while the sum is 35.

The spelling of 18215302193 in words is "eighteen billion, two hundred fifteen million, three hundred two thousand, one hundred ninety-three".