30930903906 has 64 divisors (see below), whose sum is σ = 71503810560. Its totient is φ = 8737021440.

The previous prime is 30930903893. The next prime is 30930903959. The reversal of 30930903906 is 60930903903.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4441255 + ... + 4448213.

It is an arithmetic number, because the mean of its divisors is an integer number (1117247040).

Almost surely, 2^30930903906 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30930903906, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35751905280).

30930903906 is an abundant number, since it is smaller than the sum of its proper divisors (40572906654).

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

30930903906 is a wasteful number, since it uses less digits than its factorization.

30930903906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8159.

The product of its (nonzero) digits is 118098, while the sum is 42.

The spelling of 30930903906 in words is "thirty billion, nine hundred thirty million, nine hundred three thousand, nine hundred six".