18743274 has 48 divisors (see below), whose sum is σ = 44632224. Its totient is φ = 5637600.

The previous prime is 18743239. The next prime is 18743281. The reversal of 18743274 is 47234781.

It is a happy number.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a nialpdrome in base 11.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35577 + ... + 36099.

It is an arithmetic number, because the mean of its divisors is an integer number (929838).

Almost surely, 2^18743274 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18743274, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22316112).

18743274 is an abundant number, since it is smaller than the sum of its proper divisors (25888950).

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

18743274 is a wasteful number, since it uses less digits than its factorization.

18743274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 723 (or 720 counting only the distinct ones).

The product of its digits is 37632, while the sum is 36.

The square root of 18743274 is about 4329.3502976775. The cubic root of 18743274 is about 265.6328720897.

The spelling of 18743274 in words is "eighteen million, seven hundred forty-three thousand, two hundred seventy-four".