18943396 has 6 divisors (see below), whose sum is σ = 33150950. Its totient is φ = 9471696.

The previous prime is 18943381. The next prime is 18943417. The reversal of 18943396 is 69334981.

It can be written as a sum of positive squares in only one way, i.e., 12110400 + 6832996 = 3480^2 + 2614^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2367921 + ... + 2367928.

Almost surely, 2^18943396 is an apocalyptic number.

It is an amenable number.

18943396 is a deficient number, since it is larger than the sum of its proper divisors (14207554).

18943396 is a wasteful number, since it uses less digits than its factorization.

18943396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4735853 (or 4735851 counting only the distinct ones).

The product of its digits is 139968, while the sum is 43.

The square root of 18943396 is about 4352.4011763623. The cubic root of 18943396 is about 266.5749149625.

The spelling of 18943396 in words is "eighteen million, nine hundred forty-three thousand, three hundred ninety-six".