18973236 has 24 divisors (see below), whose sum is σ = 44343040. Its totient is φ = 6314112.

The previous prime is 18973231. The next prime is 18973237. The reversal of 18973236 is 63237981.

It is a junction number, because it is equal to n+sod(n) for n = 18973194 and 18973203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18973231) 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, 11325 + ... + 12891.

Almost surely, 2^18973236 is an apocalyptic number.

It is an amenable number.

18973236 is an abundant number, since it is smaller than the sum of its proper divisors (25369804).

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

18973236 is a wasteful number, since it uses less digits than its factorization.

18973236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2583 (or 2581 counting only the distinct ones).

The product of its digits is 54432, while the sum is 39.

The square root of 18973236 is about 4355.8278202886. The cubic root of 18973236 is about 266.7148128346.

The spelling of 18973236 in words is "eighteen million, nine hundred seventy-three thousand, two hundred thirty-six".