30821254920 has 96 divisors (see below), whose sum is σ = 103879077120. Its totient is φ = 8218998720.

The previous prime is 30821254913. The next prime is 30821254927. The reversal of 30821254920 is 2945212803.

It is a happy number.

30821254920 is a `hidden beast` number, since 3 + 0 + 82 + 12 + 549 + 20 = 666.

It is an interprime number because it is at equal distance from previous prime (30821254913) and next prime (30821254927).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (30821254927) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1575736 + ... + 1595175.

It is an arithmetic number, because the mean of its divisors is an integer number (1082073720).

Almost surely, 2^30821254920 is an apocalyptic number.

30821254920 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30821254920 is an abundant number, since it is smaller than the sum of its proper divisors (73057822200).

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

30821254920 is a wasteful number, since it uses less digits than its factorization.

30821254920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3170937 (or 3170921 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The spelling of 30821254920 in words is "thirty billion, eight hundred twenty-one million, two hundred fifty-four thousand, nine hundred twenty".