18230836 has 12 divisors (see below), whose sum is σ = 34358212. Its totient is φ = 8414208.

The previous prime is 18230833. The next prime is 18230837. The reversal of 18230836 is 63803281.

It can be written as a sum of positive squares in 2 ways, for example, as 7952400 + 10278436 = 2820^2 + 3206^2 .

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 18230798 and 18230807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18230833) 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, 175245 + ... + 175348.

Almost surely, 2^18230836 is an apocalyptic number.

It is an amenable number.

18230836 is a deficient number, since it is larger than the sum of its proper divisors (16127376).

18230836 is a wasteful number, since it uses less digits than its factorization.

18230836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350610 (or 350608 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 18230836 is about 4269.7583069771. The cubic root of 18230836 is about 263.1896832645.

The spelling of 18230836 in words is "eighteen million, two hundred thirty thousand, eight hundred thirty-six".