18872436 has 24 divisors (see below), whose sum is σ = 48039264. Its totient is φ = 5718880.

The previous prime is 18872429. The next prime is 18872437. The reversal of 18872436 is 63427881.

It is a junction number, because it is equal to n+sod(n) for n = 18872394 and 18872403.

It is a congruent number.

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, 71355 + ... + 71618.

It is an arithmetic number, because the mean of its divisors is an integer number (2001636).

Almost surely, 2^18872436 is an apocalyptic number.

It is an amenable number.

18872436 is an abundant number, since it is smaller than the sum of its proper divisors (29166828).

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

18872436 is a wasteful number, since it uses less digits than its factorization.

18872436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142991 (or 142989 counting only the distinct ones).

The product of its digits is 64512, while the sum is 39.

The square root of 18872436 is about 4344.2417059828. The cubic root of 18872436 is about 266.2416444732.

The spelling of 18872436 in words is "eighteen million, eight hundred seventy-two thousand, four hundred thirty-six".