18872434 has 16 divisors (see below), whose sum is σ = 34056000. Its totient is φ = 7662384.

The previous prime is 18872429. The next prime is 18872437. The reversal of 18872434 is 43427881.

It is a junction number, because it is equal to n+sod(n) for n = 18872393 and 18872402.

It is not an unprimeable number, because it can be changed into a prime (18872437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35209 + ... + 35740.

It is an arithmetic number, because the mean of its divisors is an integer number (2128500).

Almost surely, 2^18872434 is an apocalyptic number.

18872434 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18872434 is a deficient number, since it is larger than the sum of its proper divisors (15183566).

18872434 is a wasteful number, since it uses less digits than its factorization.

18872434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70977.

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

The square root of 18872434 is about 4344.2414757930. The cubic root of 18872434 is about 266.2416350682.

It can be divided in two parts, 18872 and 434, that added together give a triangular number (19306 = T₁₉₆).

The spelling of 18872434 in words is "eighteen million, eight hundred seventy-two thousand, four hundred thirty-four".