18272834 has 4 divisors (see below), whose sum is σ = 27409254. Its totient is φ = 9136416.

The previous prime is 18272809. The next prime is 18272867. The reversal of 18272834 is 43827281.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 12285025 + 5987809 = 3505^2 + 2447^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18272794 and 18272803.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4568207 + ... + 4568210.

Almost surely, 2^18272834 is an apocalyptic number.

18272834 is a deficient number, since it is larger than the sum of its proper divisors (9136420).

18272834 is an equidigital number, since it uses as much as digits as its factorization.

18272834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9136419.

The product of its digits is 21504, while the sum is 35.

The square root of 18272834 is about 4274.6735547875. The cubic root of 18272834 is about 263.3916298145.

The spelling of 18272834 in words is "eighteen million, two hundred seventy-two thousand, eight hundred thirty-four".