30530681999 has 4 divisors (see below), whose sum is σ = 30532929240. Its totient is φ = 30528434760.

The previous prime is 30530681989. The next prime is 30530682029. The reversal of 30530681999 is 99918603503.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99918603503 = 23603 ⋅4233301.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30530681999 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30530681999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30530681989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1103117 + ... + 1130454.

It is an arithmetic number, because the mean of its divisors is an integer number (7633232310).

Almost surely, 2^30530681999 is an apocalyptic number.

30530681999 is a deficient number, since it is larger than the sum of its proper divisors (2247241).

30530681999 is a wasteful number, since it uses less digits than its factorization.

30530681999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2247240.

The product of its (nonzero) digits is 1574640, while the sum is 53.

The spelling of 30530681999 in words is "thirty billion, five hundred thirty million, six hundred eighty-one thousand, nine hundred ninety-nine".