30921459693 has 24 divisors (see below), whose sum is σ = 45404641728. Its totient is φ = 18680226048.

The previous prime is 30921459691. The next prime is 30921459697. The reversal of 30921459693 is 39695412903.

It is not a de Polignac number, because 30921459693 - 2¹ = 30921459691 is a prime.

It is a super-2 number, since 2×30921459693² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30921459691) 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 23 ways as a sum of consecutive naturals, for example, 595780 + ... + 645597.

It is an arithmetic number, because the mean of its divisors is an integer number (1891860072).

Almost surely, 2^30921459693 is an apocalyptic number.

It is an amenable number.

30921459693 is a deficient number, since it is larger than the sum of its proper divisors (14483182035).

30921459693 is a wasteful number, since it uses less digits than its factorization.

30921459693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1241441 (or 1241422 counting only the distinct ones).

The product of its (nonzero) digits is 1574640, while the sum is 51.

The spelling of 30921459693 in words is "thirty billion, nine hundred twenty-one million, four hundred fifty-nine thousand, six hundred ninety-three".