18354272 has 12 divisors (see below), whose sum is σ = 36135036. Its totient is φ = 9177120.

The previous prime is 18354269. The next prime is 18354313. The reversal of 18354272 is 27245381.

It is a Harshad number since it is a multiple of its sum of digits (32), and also a Moran number because the ratio is a prime number: 573571 = 18354272 / (1 + 8 + 3 + 5 + 4 + 2 + 7 + 2).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 286754 + ... + 286817.

It is an arithmetic number, because the mean of its divisors is an integer number (3011253).

Almost surely, 2^18354272 is an apocalyptic number.

It is an amenable number.

18354272 is a deficient number, since it is larger than the sum of its proper divisors (17780764).

18354272 is an equidigital number, since it uses as much as digits as its factorization.

18354272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 573581 (or 573573 counting only the distinct ones).

The product of its digits is 13440, while the sum is 32.

The square root of 18354272 is about 4284.1886046252. The cubic root of 18354272 is about 263.7823427915.

The spelling of 18354272 in words is "eighteen million, three hundred fifty-four thousand, two hundred seventy-two".