18874234 has 4 divisors (see below), whose sum is σ = 28311354. Its totient is φ = 9437116.

The previous prime is 18874231. The next prime is 18874241. The reversal of 18874234 is 43247881.

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., 18037009 + 837225 = 4247^2 + 915^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18874193 and 18874202.

It is not an unprimeable number, because it can be changed into a prime (18874231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4718557 + ... + 4718560.

Almost surely, 2^18874234 is an apocalyptic number.

18874234 is a deficient number, since it is larger than the sum of its proper divisors (9437120).

18874234 is an equidigital number, since it uses as much as digits as its factorization.

18874234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9437119.

The product of its digits is 43008, while the sum is 37.

The square root of 18874234 is about 4344.4486416575. The cubic root of 18874234 is about 266.2500992601.

The spelling of 18874234 in words is "eighteen million, eight hundred seventy-four thousand, two hundred thirty-four".