30300000021 has 8 divisors (see below), whose sum is σ = 44888888960. Its totient is φ = 20199999996.

The previous prime is 30300000013. The next prime is 30300000037. The reversal of 30300000021 is 12000000303.

It is a happy number.

It is not a de Polignac number, because 30300000021 - 2³ = 30300000013 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30299999949 and 30300000012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30300000121) 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, 561111085 + ... + 561111138.

It is an arithmetic number, because the mean of its divisors is an integer number (5611111120).

Almost surely, 2^30300000021 is an apocalyptic number.

It is an amenable number.

30300000021 is a deficient number, since it is larger than the sum of its proper divisors (14588888939).

30300000021 is a wasteful number, since it uses less digits than its factorization.

30300000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1122222232 (or 1122222226 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 9.

Adding to 30300000021 its reverse (12000000303), we get a palindrome (42300000324).

The spelling of 30300000021 in words is "thirty billion, three hundred million, twenty-one", and thus it is an aban number.