30920668682439 has 24 divisors (see below), whose sum is σ = 41837901721200. Its totient is φ = 20312997214720.

The previous prime is 30920668682429. The next prime is 30920668682467. The reversal of 30920668682439 is 93428686602903.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-30920668682439 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30920668682439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30920668682429) 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, 28950199 + ... + 29999255.

It is an arithmetic number, because the mean of its divisors is an integer number (1743245905050).

Almost surely, 2^{30920668682439} is an apocalyptic number.

30920668682439 is a deficient number, since it is larger than the sum of its proper divisors (10917233038761).

30920668682439 is a wasteful number, since it uses less digits than its factorization.

30920668682439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1051151 (or 1051080 counting only the distinct ones).

The product of its (nonzero) digits is 161243136, while the sum is 66.

The spelling of 30920668682439 in words is "thirty trillion, nine hundred twenty billion, six hundred sixty-eight million, six hundred eighty-two thousand, four hundred thirty-nine".