18321603093 has 24 divisors (see below), whose sum is σ = 27384154200. Its totient is φ = 11790180864.

The previous prime is 18321603067. The next prime is 18321603127. The reversal of 18321603093 is 39030612381.

18321603093 is a `hidden beast` number, since 18 + 32 + 1 + 603 + 0 + 9 + 3 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 343620369 + 17977982724 = 18537^2 + 134082^2 .

It is not a de Polignac number, because 18321603093 - 2¹⁴ = 18321586709 is a prime.

It is a super-2 number, since 2×18321603093² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18321603493) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1470273 + ... + 1482681.

It is an arithmetic number, because the mean of its divisors is an integer number (1141006425).

Almost surely, 2^18321603093 is an apocalyptic number.

It is an amenable number.

18321603093 is a deficient number, since it is larger than the sum of its proper divisors (9062551107).

18321603093 is a wasteful number, since it uses less digits than its factorization.

18321603093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18101 (or 18098 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The spelling of 18321603093 in words is "eighteen billion, three hundred twenty-one million, six hundred three thousand, ninety-three".