18471193 has 6 divisors (see below), whose sum is σ = 20001534. Its totient is φ = 17050176.

The previous prime is 18471181. The next prime is 18471199. The reversal of 18471193 is 39117481.

It can be written as a sum of positive squares in 3 ways, for example, as 1140624 + 17330569 = 1068^2 + 4163^2 .

It is not a de Polignac number, because 18471193 - 2⁵ = 18471161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18471199) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 54480 + ... + 54817.

It is an arithmetic number, because the mean of its divisors is an integer number (3333589).

Almost surely, 2^18471193 is an apocalyptic number.

18471193 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

18471193 is a deficient number, since it is larger than the sum of its proper divisors (1530341).

18471193 is a wasteful number, since it uses less digits than its factorization.

18471193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109323 (or 109310 counting only the distinct ones).

The product of its digits is 6048, while the sum is 34.

The square root of 18471193 is about 4297.8125831637. The cubic root of 18471193 is about 264.3412760013.

The spelling of 18471193 in words is "eighteen million, four hundred seventy-one thousand, one hundred ninety-three".