18273728201 has 8 divisors (see below), whose sum is σ = 18314664840. Its totient is φ = 18232834048.

The previous prime is 18273728171. The next prime is 18273728233. The reversal of 18273728201 is 10282737281.

It can be written as a sum of positive squares in 4 ways, for example, as 200958976 + 18072769225 = 14176^2 + 134435^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18273728201 - 2¹⁰ = 18273727177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18273628201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 944315 + ... + 963471.

It is an arithmetic number, because the mean of its divisors is an integer number (2289333105).

Almost surely, 2^18273728201 is an apocalyptic number.

It is an amenable number.

18273728201 is a deficient number, since it is larger than the sum of its proper divisors (40936639).

18273728201 is a wasteful number, since it uses less digits than its factorization.

18273728201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21243.

The product of its (nonzero) digits is 75264, while the sum is 41.

The spelling of 18273728201 in words is "eighteen billion, two hundred seventy-three million, seven hundred twenty-eight thousand, two hundred one".