18723484 has 36 divisors (see below), whose sum is σ = 36274504. Its totient is φ = 8405856.

The previous prime is 18723461. The next prime is 18723487. The reversal of 18723484 is 48432781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18723487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 114787 + ... + 114949.

Almost surely, 2^18723484 is an apocalyptic number.

It is an amenable number.

18723484 is a deficient number, since it is larger than the sum of its proper divisors (17551020).

18723484 is a wasteful number, since it uses less digits than its factorization.

18723484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274 (or 225 counting only the distinct ones).

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

The square root of 18723484 is about 4327.0641317179. The cubic root of 18723484 is about 265.5393500832.

It can be divided in two parts, 1872 and 3484, that added together give a triangular number (5356 = T₁₀₃).

The spelling of 18723484 in words is "eighteen million, seven hundred twenty-three thousand, four hundred eighty-four".