18247836 has 12 divisors (see below), whose sum is σ = 42578312. Its totient is φ = 6082608.

The previous prime is 18247819. The next prime is 18247837. The reversal of 18247836 is 63874281.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 18247794 and 18247803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18247837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 760315 + ... + 760338.

Almost surely, 2^18247836 is an apocalyptic number.

It is an amenable number.

18247836 is an abundant number, since it is smaller than the sum of its proper divisors (24330476).

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

18247836 is a wasteful number, since it uses less digits than its factorization.

18247836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1520660 (or 1520658 counting only the distinct ones).

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

The square root of 18247836 is about 4271.7485881077. The cubic root of 18247836 is about 263.2714647512.

The spelling of 18247836 in words is "eighteen million, two hundred forty-seven thousand, eight hundred thirty-six".