18272734 has 4 divisors (see below), whose sum is σ = 27409104. Its totient is φ = 9136366.

The previous prime is 18272731. The next prime is 18272747. The reversal of 18272734 is 43727281.

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

It is a self number, because there is not a number n which added to its sum of digits gives 18272734.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18272731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4568182 + ... + 4568185.

It is an arithmetic number, because the mean of its divisors is an integer number (6852276).

Almost surely, 2^18272734 is an apocalyptic number.

18272734 is a deficient number, since it is larger than the sum of its proper divisors (9136370).

18272734 is an equidigital number, since it uses as much as digits as its factorization.

18272734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9136369.

The product of its digits is 18816, while the sum is 34.

The square root of 18272734 is about 4274.6618579719. The cubic root of 18272734 is about 263.3911493342.

The spelling of 18272734 in words is "eighteen million, two hundred seventy-two thousand, seven hundred thirty-four".