30817842420 has 192 divisors, whose sum is σ = 94343671296. Its totient is φ = 7484866560.

The previous prime is 30817842373. The next prime is 30817842427. The reversal of 30817842420 is 2424871803.

It is a super-2 number, since 2×30817842420² (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 (30817842427) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7281705 + ... + 7285935.

It is an arithmetic number, because the mean of its divisors is an integer number (491373288).

Almost surely, 2^30817842420 is an apocalyptic number.

30817842420 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 30817842420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47171835648).

30817842420 is an abundant number, since it is smaller than the sum of its proper divisors (63525828876).

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

30817842420 is a wasteful number, since it uses less digits than its factorization.

30817842420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4490 (or 4488 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 39.

The spelling of 30817842420 in words is "thirty billion, eight hundred seventeen million, eight hundred forty-two thousand, four hundred twenty".