18213796 has 12 divisors (see below), whose sum is σ = 32040652. Its totient is φ = 9059328.

The previous prime is 18213781. The next prime is 18213803. The reversal of 18213796 is 69731281.

It can be written as a sum of positive squares in 2 ways, for example, as 2768896 + 15444900 = 1664^2 + 3930^2 .

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11025 + ... + 12568.

Almost surely, 2^18213796 is an apocalyptic number.

It is an amenable number.

18213796 is a deficient number, since it is larger than the sum of its proper divisors (13826856).

18213796 is a wasteful number, since it uses less digits than its factorization.

18213796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23790 (or 23788 counting only the distinct ones).

The product of its digits is 18144, while the sum is 37.

The square root of 18213796 is about 4267.7624113814. The cubic root of 18213796 is about 263.1076583151.

The spelling of 18213796 in words is "eighteen million, two hundred thirteen thousand, seven hundred ninety-six".