18236993301 has 12 divisors (see below), whose sum is σ = 26510111212. Its totient is φ = 12080555136.

The previous prime is 18236993239. The next prime is 18236993303. The reversal of 18236993301 is 10339963281.

It can be written as a sum of positive squares in 2 ways, for example, as 4329508401 + 13907484900 = 65799^2 + 117930^2 .

It is not a de Polignac number, because 18236993301 - 2⁶ = 18236993237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18236993303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6451876 + ... + 6454701.

Almost surely, 2^18236993301 is an apocalyptic number.

It is an amenable number.

18236993301 is a deficient number, since it is larger than the sum of its proper divisors (8273117911).

18236993301 is a wasteful number, since it uses less digits than its factorization.

18236993301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12906740 (or 12906737 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 45.

The spelling of 18236993301 in words is "eighteen billion, two hundred thirty-six million, nine hundred ninety-three thousand, three hundred one".