30683357647821 has 10 divisors (see below), whose sum is σ = 45835633029582. Its totient is φ = 20455571765160.

The previous prime is 30683357647783. The next prime is 30683357647823. The reversal of 30683357647821 is 12874675338603.

30683357647821 is a `hidden beast` number, since 3 + 0 + 6 + 8 + 33 + 576 + 4 + 7 + 8 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 15984491759721 + 14698865888100 = 3998061^2 + 3833910^2 .

It is not a de Polignac number, because 30683357647821 - 2⁶ = 30683357647757 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30683357647823) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 189403442190 + ... + 189403442351.

Almost surely, 2^{30683357647821} is an apocalyptic number.

It is an amenable number.

30683357647821 is a deficient number, since it is larger than the sum of its proper divisors (15152275381761).

30683357647821 is an equidigital number, since it uses as much as digits as its factorization.

30683357647821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378806884553 (or 378806884544 counting only the distinct ones).

The product of its (nonzero) digits is 121927680, while the sum is 63.

The spelling of 30683357647821 in words is "thirty trillion, six hundred eighty-three billion, three hundred fifty-seven million, six hundred forty-seven thousand, eight hundred twenty-one".