30994513920 has 480 divisors, whose sum is σ = 112204693440. Its totient is φ = 8217427968.

The previous prime is 30994513909. The next prime is 30994513931. The reversal of 30994513920 is 2931549903.

It is an interprime number because it is at equal distance from previous prime (30994513909) and next prime (30994513931).

It is a tau number, because it is divible by the number of its divisors (480).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a zygodrome in base 3.

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, 179158954 + ... + 179159126.

It is an arithmetic number, because the mean of its divisors is an integer number (233759778).

Almost surely, 2^30994513920 is an apocalyptic number.

30994513920 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30994513920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56102346720).

30994513920 is an abundant number, since it is smaller than the sum of its proper divisors (81210179520).

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

30994513920 is an frugal number, since it uses more digits than its factorization.

30994513920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227 (or 183 counting only the distinct ones).

The product of its (nonzero) digits is 262440, while the sum is 45.

The spelling of 30994513920 in words is "thirty billion, nine hundred ninety-four million, five hundred thirteen thousand, nine hundred twenty".