18964319236 has 6 divisors (see below), whose sum is σ = 33187558670. Its totient is φ = 9482159616.

The previous prime is 18964319203. The next prime is 18964319251. The reversal of 18964319236 is 63291346981.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 18117160000 + 847159236 = 134600^2 + 29106^2 .

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 as a sum of consecutive naturals, namely, 2370539901 + ... + 2370539908.

Almost surely, 2^18964319236 is an apocalyptic number.

It is an amenable number.

18964319236 is a deficient number, since it is larger than the sum of its proper divisors (14223239434).

18964319236 is a wasteful number, since it uses less digits than its factorization.

18964319236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4741079813 (or 4741079811 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 52.

The spelling of 18964319236 in words is "eighteen billion, nine hundred sixty-four million, three hundred nineteen thousand, two hundred thirty-six".