18131348 has 12 divisors (see below), whose sum is σ = 32504052. Its totient is φ = 8844480.

The previous prime is 18131303. The next prime is 18131359. The reversal of 18131348 is 84313181.

It can be written as a sum of positive squares in 2 ways, for example, as 925444 + 17205904 = 962^2 + 4148^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18131348.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55115 + ... + 55442.

It is an arithmetic number, because the mean of its divisors is an integer number (2708671).

Almost surely, 2^18131348 is an apocalyptic number.

It is an amenable number.

18131348 is a deficient number, since it is larger than the sum of its proper divisors (14372704).

18131348 is a wasteful number, since it uses less digits than its factorization.

18131348 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110602 (or 110600 counting only the distinct ones).

The product of its digits is 2304, while the sum is 29.

The square root of 18131348 is about 4258.0920610057. The cubic root of 18131348 is about 262.7100565057.

The spelling of 18131348 in words is "eighteen million, one hundred thirty-one thousand, three hundred forty-eight".