18242738 has 8 divisors (see below), whose sum is σ = 27487488. Its totient is φ = 9080244.

The previous prime is 18242737. The next prime is 18242743. The reversal of 18242738 is 83724281.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 18242698 and 18242707.

It is not an unprimeable number, because it can be changed into a prime (18242737) 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, 20006 + ... + 20897.

It is an arithmetic number, because the mean of its divisors is an integer number (3435936).

Almost surely, 2^18242738 is an apocalyptic number.

18242738 is a deficient number, since it is larger than the sum of its proper divisors (9244750).

18242738 is a wasteful number, since it uses less digits than its factorization.

18242738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41128.

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

The square root of 18242738 is about 4271.1518352782. The cubic root of 18242738 is about 263.2469452605.

It can be divided in two parts, 1824273 and 8, that added together give a palindrome (1824281).

The spelling of 18242738 in words is "eighteen million, two hundred forty-two thousand, seven hundred thirty-eight".