30919621216 has 96 divisors (see below), whose sum is σ = 72581806080. Its totient is φ = 12800870400.

The previous prime is 30919621193. The next prime is 30919621217. The reversal of 30919621216 is 61212691903.

It is a super-2 number, since 2×30919621216² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30919621217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102165 + ... + 268843.

It is an arithmetic number, because the mean of its divisors is an integer number (756060480).

Almost surely, 2^30919621216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30919621216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36290903040).

30919621216 is an abundant number, since it is smaller than the sum of its proper divisors (41662184864).

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

30919621216 is a wasteful number, since it uses less digits than its factorization.

30919621216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166748 (or 166740 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 40.

The spelling of 30919621216 in words is "thirty billion, nine hundred nineteen million, six hundred twenty-one thousand, two hundred sixteen".