30930903905 has 12 divisors (see below), whose sum is σ = 40798118676. Its totient is φ = 22495202400.

The previous prime is 30930903893. The next prime is 30930903959. The reversal of 30930903905 is 50930903903.

It can be written as a sum of positive squares in 2 ways, for example, as 4092928576 + 26837975329 = 63976^2 + 163823^2 .

It is not a de Polignac number, because 30930903905 - 2⁴ = 30930903889 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25562126 + ... + 25563335.

It is an arithmetic number, because the mean of its divisors is an integer number (3399843223).

Almost surely, 2^30930903905 is an apocalyptic number.

It is an amenable number.

30930903905 is a deficient number, since it is larger than the sum of its proper divisors (9867214771).

30930903905 is a wasteful number, since it uses less digits than its factorization.

30930903905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51125488 (or 51125477 counting only the distinct ones).

The product of its (nonzero) digits is 98415, while the sum is 41.

The spelling of 30930903905 in words is "thirty billion, nine hundred thirty million, nine hundred three thousand, nine hundred five".