18131352 has 16 divisors (see below), whose sum is σ = 45328440. Its totient is φ = 6043776.

The previous prime is 18131303. The next prime is 18131359. The reversal of 18131352 is 25313181.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 755473 = 18131352 / (1 + 8 + 1 + 3 + 1 + 3 + 5 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18131359) 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, 377713 + ... + 377760.

Almost surely, 2^18131352 is an apocalyptic number.

18131352 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18131352 is an abundant number, since it is smaller than the sum of its proper divisors (27197088).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18131352 is a wasteful number, since it uses less digits than its factorization.

18131352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755482 (or 755478 counting only the distinct ones).

The product of its digits is 720, while the sum is 24.

The square root of 18131352 is about 4258.0925306996. The cubic root of 18131352 is about 262.7100758247.

The spelling of 18131352 in words is "eighteen million, one hundred thirty-one thousand, three hundred fifty-two".