30999999999904 has 24 divisors (see below), whose sum is σ = 65725961539140. Its totient is φ = 14307692307456.

The previous prime is 30999999999851. The next prime is 30999999999961. The reversal of 30999999999904 is 40999999999903.

It can be written as a sum of positive squares in 2 ways, for example, as 30988683295504 + 11316704400 = 5566748^2 + 106380^2 .

It is a junction number, because it is equal to n+sod(n) for n = 30999999999797 and 30999999999806.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37259614969 + ... + 37259615800.

Almost surely, 2^{30999999999904} is an apocalyptic number.

It is an amenable number.

30999999999904 is an abundant number, since it is smaller than the sum of its proper divisors (34725961539236).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30999999999904 is a wasteful number, since it uses less digits than its factorization.

30999999999904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74519230792 (or 74519230784 counting only the distinct ones).

The product of its (nonzero) digits is 41841412812, while the sum is 97.

Subtracting 30999999999904 from its reverse (40999999999903), we obtain a palindrome (9999999999999).

The spelling of 30999999999904 in words is "thirty trillion, nine hundred ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred four".