30321020 has 24 divisors (see below), whose sum is σ = 65156784. Its totient is φ = 11846016.

The previous prime is 30321001. The next prime is 30321023. The reversal of 30321020 is 2012303.

It is a junction number, because it is equal to n+sod(n) for n = 30320992 and 30321010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30321023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16769 + ... + 18488.

It is an arithmetic number, because the mean of its divisors is an integer number (2714866).

Almost surely, 2^30321020 is an apocalyptic number.

It is an amenable number.

30321020 is an abundant number, since it is smaller than the sum of its proper divisors (34835764).

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

30321020 is a wasteful number, since it uses less digits than its factorization.

30321020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35309 (or 35307 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 11.

The square root of 30321020 is about 5506.4525785663. The cubic root of 30321020 is about 311.8276360028.

Adding to 30321020 its reverse (2012303), we get a palindrome (32333323).

The spelling of 30321020 in words is "thirty million, three hundred twenty-one thousand, twenty".