30196021 has 2 divisors, whose sum is σ = 30196022. Its totient is φ = 30196020.

The previous prime is 30196013. The next prime is 30196031. The reversal of 30196021 is 12069103.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27185796 + 3010225 = 5214^2 + 1735^2 .

It is an emirp because it is prime and its reverse (12069103) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30196021 - 2³ = 30196013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30195983 and 30196001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30196031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15098010 + 15098011.

It is an arithmetic number, because the mean of its divisors is an integer number (15098011).

Almost surely, 2^30196021 is an apocalyptic number.

It is an amenable number.

30196021 is a deficient number, since it is larger than the sum of its proper divisors (1).

30196021 is an equidigital number, since it uses as much as digits as its factorization.

30196021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 30196021 is about 5495.0906270962. The cubic root of 30196021 is about 311.3985406271.

The spelling of 30196021 in words is "thirty million, one hundred ninety-six thousand, twenty-one".