30186331993 has 8 divisors (see below), whose sum is σ = 30526110720. Its totient is φ = 29848446720.

The previous prime is 30186331969. The next prime is 30186331997. The reversal of 30186331993 is 39913368103.

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 30186331993 - 2¹³ = 30186323801 is a prime.

It is a super-2 number, since 2×30186331993² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30186331997) 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, 441288 + ... + 505081.

It is an arithmetic number, because the mean of its divisors is an integer number (3815763840).

Almost surely, 2^30186331993 is an apocalyptic number.

It is an amenable number.

30186331993 is a deficient number, since it is larger than the sum of its proper divisors (339778727).

30186331993 is a wasteful number, since it uses less digits than its factorization.

30186331993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 946727.

The product of its (nonzero) digits is 314928, while the sum is 46.

The spelling of 30186331993 in words is "thirty billion, one hundred eighty-six million, three hundred thirty-one thousand, nine hundred ninety-three".