30621396834 has 144 divisors (see below), whose sum is σ = 78907608000. Its totient is φ = 8554569408.

The previous prime is 30621396833. The next prime is 30621396857. The reversal of 30621396834 is 43869312603.

It is a self number, because there is not a number n which added to its sum of digits gives 30621396834.

It is not an unprimeable number, because it can be changed into a prime (30621396833) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 10354084 + ... + 10357040.

It is an arithmetic number, because the mean of its divisors is an integer number (547969500).

Almost surely, 2^30621396834 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30621396834, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39453804000).

30621396834 is an abundant number, since it is smaller than the sum of its proper divisors (48286211166).

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

30621396834 is a wasteful number, since it uses less digits than its factorization.

30621396834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3237 (or 3227 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 45.

The spelling of 30621396834 in words is "thirty billion, six hundred twenty-one million, three hundred ninety-six thousand, eight hundred thirty-four".