30321213820 has 12 divisors (see below), whose sum is σ = 63674549064. Its totient is φ = 12128485520.

The previous prime is 30321213803. The next prime is 30321213869. The reversal of 30321213820 is 2831212303.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 758030326 + ... + 758030365.

It is an arithmetic number, because the mean of its divisors is an integer number (5306212422).

Almost surely, 2^30321213820 is an apocalyptic number.

It is an amenable number.

30321213820 is an abundant number, since it is smaller than the sum of its proper divisors (33353335244).

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

30321213820 is a wasteful number, since it uses less digits than its factorization.

30321213820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1516060700 (or 1516060698 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The spelling of 30321213820 in words is "thirty billion, three hundred twenty-one million, two hundred thirteen thousand, eight hundred twenty".